diff --git a/README.md b/README.md
index 2f51477..fdd3c5f 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
 
 - Persistent indexes support for: `IndexedDB` (Browser), `Redis`, `SQLite`, `Postgres`, `MongoDB`, `Clickhouse`
 - Enhanced language customization via the new `Encoder` class
-- Query performance achieve results up to 7 times faster compared to the previous generation v0.7.x
+- Query performance achieve results up to 4.5 times faster compared to the previous generation v0.7.x by also improving the quality of results
 - Enhanced support for larger indexes or larger result sets
 - Improved offset and limit processing achieve up to 100 times faster traversal performance through large datasets
 - Support for larger In-Memory index with extended key size (the defaults maximum keystore limit is: 2^24)
@@ -70,40 +70,57 @@ All search capabilities are available on persistent indexes like:
 
 All persistent variants are optimized for larger sized indexes under heavy workload. Almost every task will be streamlined to run in batch/parallel, getting the most out of the selected database engine. Whereas the InMemory index can't share their data between different nodes when running in a cluster, every persistent storage can handle this by default.
 
-### Example Node.js
+### Examples Node.js
 
 - [nodejs-commonjs](example/nodejs-commonjs):
+  - [basic](example/nodejs-commonjs/basic)
+  - [basic-suggestion](example/nodejs-commonjs/basic-suggestion)
+  - [basic-persistent](example/nodejs-commonjs/basic-persistent)
+  - [basic-resolver](example/nodejs-commonjs/basic-resolver)
+  - [basic-worker](example/nodejs-commonjs/basic-worker)
+  - [basic-worker-extern-config](example/nodejs-commonjs/basic-worker-extern-config)
   - [document](example/nodejs-commonjs/document)
   - [document-persistent](example/nodejs-commonjs/document-persistent)
   - [document-worker](example/nodejs-commonjs/document-worker)
   - [document-worker-extern-config](example/nodejs-commonjs/document-worker-extern-config)
+  - [language-pack](example/nodejs-commonjs/language-pack)
 - [nodejs-esm](example/nodejs-esm):
+  - [basic](example/nodejs-esm/basic)
+  - [basic-suggestion](example/nodejs-esm/basic-suggestion)
+  - [basic-persistent](example/nodejs-esm/basic-persistent)
+  - [basic-resolver](example/nodejs-esm/basic-resolver)
+  - [basic-worker](example/nodejs-esm/basic-worker)
+  - [basic-worker-extern-config](example/nodejs-esm/basic-worker-extern-config)
   - [document](example/nodejs-esm/document)
   - [document-persistent](example/nodejs-esm/document-persistent)
   - [document-worker](example/nodejs-esm/document-worker)
   - [document-worker-extern-config](example/nodejs-esm/document-worker-extern-config)
-  - [language-packs](example/nodejs-esm/language-packs)
+  - [language-pack](example/nodejs-esm/language-pack)
 
-### Example Browser
+### Examples Browser
 
 - [browser-legacy](example/browser-legacy):
   - [basic](example/browser-legacy/basic)
-  - [basic-persistent](example/browser-legacy/basic-persistent)
   - [basic-suggestion](example/browser-legacy/basic-suggestion)
+  - [basic-persistent](example/browser-legacy/basic-persistent)
+  - [basic-resolver](example/browser-legacy/basic-resolver)
   - [basic-worker](example/browser-legacy/basic-worker)
   - [document](example/browser-legacy/document)
   - [document-persistent](example/browser-legacy/document-persistent)
   - [document-worker](example/browser-legacy/document-worker)
+  - [language-pack](example/browser-legacy/language-pack)
 - [browser-module](example/browser-module):
   - [basic](example/browser-module/basic)
-  - [basic-persistent](example/browser-module/basic-persistent)
   - [basic-suggestion](example/browser-module/basic-suggestion)
+  - [basic-persistent](example/browser-module/basic-persistent)
+  - [basic-resolver](example/browser-module/basic-resolver)
   - [basic-worker](example/browser-module/basic-worker)
   - [basic-worker-extern-config](example/browser-module/basic-worker-extern-config)
   - [document](example/browser-module/document)
   - [document-persistent](example/browser-module/document-persistent)
   - [document-worker](example/browser-module/document-worker)
   - [document-worker-extern-config](example/browser-module/document-worker-extern-config)
+  - [language-pack](example/browser-module/language-pack)
 
 ```js
 import FlexSearchIndex from "./index.js";
@@ -2188,9 +2205,6 @@ A formula to determine a well balanced value for the `resolution` is: $2*floor(\
 
 ## Migration
 
-<!--
-- Using the `async` variants like `.searchAsync` is now deprecated, asynchronous responses will always return from Worker-Index and from Persistent-Index, everything else will return a non-promised result. Having both types of methods looks like the developers can choose between them, but they can't.
--->
 - The index option property "minlength" has moved to the Encoder Class
 - The index option flag "optimize" was removed
 - The index option flag "lang" was replaced by the Encoder Class `.assign()`
@@ -2204,4 +2218,13 @@ A formula to determine a well balanced value for the `resolution` is: $2*floor(\
 - The static methods `FlexSearch.registerCharset()` and `FlexSearch.registerLanguage()` was removed, those collections are now exported to `FlexSearch.Charset` which can be accessed as module `import { Charset } from "flexsearch"` and language packs are now applied by `encoder.assign()`
 - Instead of e.g. "latin:simple" the Charset collection is exported as a module and has to be imported by e.g. `import LatinSimple from "./charset.js"` and then assigned to an existing Encoder by `encoder.assign(LatinSimple)` or by creation `encoder = new Encoder(LatinSimple)`
 - You can import language packs by `dist/module/lang/*` when using ESM and by `const EnglishPreset = require("flexsearch/lang/en");` when using CommonJS (Node.js)
-- The method `index.append()` is now deprecated and will be removed in the near future, because it isn't consistent and leads into unexpected behavior when not used properly. You should only use `index.add()` which also supports an Array of contents.
\ No newline at end of file
+- The method `index.append()` is now deprecated and will be removed in the near future, because it isn't consistent and leads into unexpected behavior when not used properly. You should only use `index.add()` to push contents to the index.
+- Using the `async` variants like `.searchAsync` is now deprecated (but still works), asynchronous responses will always return from Worker-Index and from Persistent-Index, everything else will return a non-promised result. Having both types of methods looks like the developers can choose between them, but they can't.
+
+## Not finished yet
+
+Unfortunately, not everything could be finished and needs to be done in the upcoming version.
+
+- The `Resolver` does not support Document-Indexes, there is still some work to do.
+- Config serialization for persistent indexes (store configuration, check migrations, import and restore field configurations)
+- Tooling for persistent indexes (list all tables, remove tables)
\ No newline at end of file
diff --git a/example/browser-legacy/basic-persistent/index.html b/example/browser-legacy/basic-persistent/index.html
index 43aa8be..ffe4c79 100644
--- a/example/browser-legacy/basic-persistent/index.html
+++ b/example/browser-legacy/basic-persistent/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-persistent</title>
+  <title>Example: browser-legacy-basic-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic-resolver/index.html b/example/browser-legacy/basic-resolver/index.html
new file mode 100644
index 0000000..a13a833
--- /dev/null
+++ b/example/browser-legacy/basic-resolver/index.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, height=device-height">
+  <title>Example: browser-legacy-basic-resolver</title>
+</head>
+<body style="white-space: pre">
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.min.js"></script>
+<script>
+
+  // create a simple index which can store id-content-pairs
+  const index = new FlexSearch.Index({
+    tokenize: "forward"
+  });
+
+  // some test data
+  const data = [
+    'cats abcd efgh ijkl dogs pigs rats cute',
+    'cats abcd efgh ijkl dogs pigs cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+  ];
+
+  // add data to the index
+  data.forEach((item, id) => {
+    index.add(id, item);
+  });
+
+  // perform query
+  const result = new FlexSearch.Resolver({
+    index: index,
+    query: "black"
+  })
+  .or({
+    index: index,
+    query: "cute"
+  })
+  .and([{
+    index: index,
+    query: "dog"
+  },{
+    index: index,
+    query: "cat"
+  }])
+  .not({
+    index: index,
+    query: "rat"
+  })
+  .resolve();
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+  });
+
+  function log(str){
+    document.body.appendChild(
+      document.createTextNode(str + "\n")
+    );
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/example/browser-legacy/basic-suggestion/index.html b/example/browser-legacy/basic-suggestion/index.html
index 81fe991..310d986 100644
--- a/example/browser-legacy/basic-suggestion/index.html
+++ b/example/browser-legacy/basic-suggestion/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-suggestion</title>
+  <title>Example: browser-legacy-basic-suggestion</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
@@ -18,7 +18,7 @@
   const data = [
     'cats abcd efgh ijkl mnop qrst uvwx cute',
     'cats abcd efgh ijkl mnop qrst cute',
-    'cats abcd efgh ijkl mnop cute',
+    'cats abcd efgh ijkl dogs cute',
     'cats abcd efgh ijkl cute',
     'cats abcd efgh cute',
     'cats abcd cute',
@@ -32,7 +32,7 @@
 
   // perform query
   const result = index.search({
-    query: "black or cute or yellow cat",
+    query: "black dog or cute cat",
     suggest: true
   });
 
diff --git a/example/browser-legacy/basic-worker/index.html b/example/browser-legacy/basic-worker/index.html
index 188e677..1e63a93 100644
--- a/example/browser-legacy/basic-worker/index.html
+++ b/example/browser-legacy/basic-worker/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-worker</title>
+  <title>Example: browser-legacy-basic-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic/index.html b/example/browser-legacy/basic/index.html
index 8b7a0aa..5e5b64d 100644
--- a/example/browser-legacy/basic/index.html
+++ b/example/browser-legacy/basic/index.html
@@ -3,14 +3,16 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic</title>
+  <title>Example: browser-legacy-basic</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
   const index = new FlexSearch.Index({
+    // use forward when you want to match partials
+    // e.g. match "flexsearch" when query "flex"
     tokenize: "forward"
   });
 
diff --git a/example/browser-legacy/document-persistent/index.html b/example/browser-legacy/document-persistent/index.html
index e0b7ec5..2b87190 100644
--- a/example/browser-legacy/document-persistent/index.html
+++ b/example/browser-legacy/document-persistent/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document-persistent</title>
+  <title>Example: browser-legacy-document-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document-worker/index.html b/example/browser-legacy/document-worker/index.html
index 5952791..47f90a3 100644
--- a/example/browser-legacy/document-worker/index.html
+++ b/example/browser-legacy/document-worker/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document-worker</title>
+  <title>Example: browser-legacy-document-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document/index.html b/example/browser-legacy/document/index.html
index e709016..4798671 100644
--- a/example/browser-legacy/document/index.html
+++ b/example/browser-legacy/document/index.html
@@ -3,10 +3,10 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document</title>
+  <title>Example: browser-legacy-document</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.compact.min.js"></script>
 <script>
 
   // some test data
diff --git a/example/browser-legacy/language-pack/index.html b/example/browser-legacy/language-pack/index.html
new file mode 100644
index 0000000..5f27e4e
--- /dev/null
+++ b/example/browser-legacy/language-pack/index.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, height=device-height">
+  <title>Example: browser-legacy-language-packs</title>
+</head>
+<body style="white-space: pre">
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.compact.min.js"></script>
+<!-- Load language pack after loading the library -->
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/lang/en.min.js"></script>
+<script>
+
+  const encoder = new FlexSearch.Encoder(
+    FlexSearch.Charset.LatinSimple,
+    FlexSearch.Language.en
+  );
+
+  // create a simple index which can store id-content-pairs
+  const index = new FlexSearch.Index({
+    tokenize: "forward",
+    encoder: encoder
+  });
+
+  // some test data
+  const data = [
+    'She doesn’t get up at six o’clock.',
+    'It\'s been raining for five hours now.'
+  ];
+
+  // add data to the index
+  data.forEach((item, id) => {
+    index.add(id, item);
+  });
+
+  // perform query
+  let result = index.search("she does not at clock");
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+    log("\n-------------------------------------\n");
+  });
+
+  // perform query
+  result = index.search("it is raining now");
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+  });
+
+  function log(str){
+    document.body.appendChild(
+      document.createTextNode(str + "\n")
+    );
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/example/browser-module/basic-persistent/index.html b/example/browser-module/basic-persistent/index.html
index e0b4d95..a480088 100644
--- a/example/browser-module/basic-persistent/index.html
+++ b/example/browser-module/basic-persistent/index.html
@@ -3,12 +3,12 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-persistent</title>
+  <title>Example: browser-module-basic-persistent</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
 
   // create DB instance with namespace
   const db = new IndexedDB("my-store");
@@ -34,6 +34,7 @@
     'cats cute'
   ];
 
+  // add data to the index
   data.forEach((item, id) => {
     index.add(id, item);
   });
@@ -41,14 +42,14 @@
   // transfer changes (bulk)
   await index.commit();
 
+  // perform query
   const result = await index.search({
     query: "cute cat",
     suggest: true
   });
 
-  console.log(result);
-
   result.forEach(i => {
+    console.log(data[i]);
     log(data[i]);
   });
 
diff --git a/example/browser-module/basic-resolver/index.html b/example/browser-module/basic-resolver/index.html
new file mode 100644
index 0000000..a30c588
--- /dev/null
+++ b/example/browser-module/basic-resolver/index.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, height=device-height">
+  <title>Example: browser-module-basic-resolver</title>
+</head>
+<body style="white-space: pre">
+<script type="module">
+
+  import { Index, Resolver } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
+
+  // create a simple index which can store id-content-pairs
+  const index = new Index({
+    tokenize: "forward"
+  });
+
+  // some test data
+  const data = [
+    'cats abcd efgh ijkl dogs pigs rats cute',
+    'cats abcd efgh ijkl dogs pigs cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+  ];
+
+  // add data to the index
+  data.forEach((item, id) => {
+    index.add(id, item);
+  });
+
+  // perform query
+  const result = new Resolver({
+    index: index,
+    query: "black"
+  })
+  .or({
+    index: index,
+    query: "cute"
+  })
+  .and([{
+    index: index,
+    query: "dog"
+  },{
+    index: index,
+    query: "cat"
+  }])
+  .not({
+    index: index,
+    query: "rat"
+  })
+  .resolve();
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+  });
+
+  function log(str){
+    document.body.appendChild(
+      document.createTextNode(str + "\n")
+    );
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/example/browser-module/basic-suggestion/index.html b/example/browser-module/basic-suggestion/index.html
index 4bcbe03..7086142 100644
--- a/example/browser-module/basic-suggestion/index.html
+++ b/example/browser-module/basic-suggestion/index.html
@@ -3,12 +3,12 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-suggestion</title>
+  <title>Example: browser-module-basic-suggestion</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
@@ -19,20 +19,21 @@
   const data = [
     'cats abcd efgh ijkl mnop qrst uvwx cute',
     'cats abcd efgh ijkl mnop qrst cute',
-    'cats abcd efgh ijkl mnop cute',
+    'cats abcd efgh ijkl dogs cute',
     'cats abcd efgh ijkl cute',
     'cats abcd efgh cute',
     'cats abcd cute',
     'cats cute'
   ];
 
+  // add data to the index
   data.forEach((item, id) => {
     index.add(id, item);
   });
 
   // perform query
   const result = index.search({
-    query: "black or cute or yellow cat",
+    query: "black dog or cute cat",
     suggest: true
   });
 
diff --git a/example/browser-module/basic-worker-extern-config/config.js b/example/browser-module/basic-worker-extern-config/config.js
new file mode 100644
index 0000000..941f73c
--- /dev/null
+++ b/example/browser-module/basic-worker-extern-config/config.js
@@ -0,0 +1,10 @@
+import { Encoder } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
+
+export default {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    })
+};
\ No newline at end of file
diff --git a/example/browser-module/basic-worker-extern-config/index.html b/example/browser-module/basic-worker-extern-config/index.html
index c8d6b09..878c691 100644
--- a/example/browser-module/basic-worker-extern-config/index.html
+++ b/example/browser-module/basic-worker-extern-config/index.html
@@ -3,16 +3,18 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-worker-extern-config</title>
+  <title>Example: browser-module-basic-worker-extern-config</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  // you can't load from CDN because of Same-Origin-Policy
+  import { Worker as WorkerIndex } from "../../../dist/flexsearch.bundle.module.min.js";
+  const dirname = import.meta.url.replace("/index.html", "");
 
   // create a simple index which can store id-content-pairs
-  const index = new Index({
-    tokenize: "forward"
+  const index = await new WorkerIndex({
+    config: dirname + "/config.js"
   });
 
   // some test data
@@ -26,14 +28,14 @@
     'cats cute'
   ];
 
+  // add data to the index
   data.forEach((item, id) => {
     index.add(id, item);
   });
 
   // perform query
   const result = await index.search({
-    query: "cute cat",
-    suggest: true
+    query: "cute cat"
   });
 
   // display results
diff --git a/example/browser-module/basic-worker/index.html b/example/browser-module/basic-worker/index.html
index f9d7373..14ffdcb 100644
--- a/example/browser-module/basic-worker/index.html
+++ b/example/browser-module/basic-worker/index.html
@@ -3,12 +3,13 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic-worker</title>
+  <title>Example: browser-module-basic-worker</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Worker as WorkerIndex } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  // you can't load from CDN because of Same-Origin-Policy
+  import { Worker as WorkerIndex } from "../../../dist/flexsearch.bundle.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new WorkerIndex({
@@ -26,6 +27,7 @@
     'cats cute'
   ];
 
+  // add test data
   data.forEach((item, id) => {
     index.add(id, item);
   });
diff --git a/example/browser-module/basic/index.html b/example/browser-module/basic/index.html
index b3cf0dd..0989ef4 100644
--- a/example/browser-module/basic/index.html
+++ b/example/browser-module/basic/index.html
@@ -3,15 +3,17 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-basic</title>
+  <title>Example: browser-module-basic</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
+    // use forward when you want to match partials
+    // e.g. match "flexsearch" when query "flex"
     tokenize: "forward"
   });
 
@@ -26,21 +28,13 @@
     'cats cute'
   ];
 
+  // add data to the index
   data.forEach((item, id) => {
     index.add(id, item);
   });
 
-  index.search("cute cats").forEach(i => {
-    const result = data[i];
-    log(result);
-  });
-
-  log("\n----------------------\n");
-
-  index.search({
-    query: "black or cute or yellow cats",
-    suggest: true
-  }).forEach(i => {
+  // perform query
+  index.search("cute cat").forEach(i => {
     const result = data[i];
     log(result);
   });
diff --git a/example/browser-module/document-persistent/index.html b/example/browser-module/document-persistent/index.html
index 73c38e1..b8e1ad8 100644
--- a/example/browser-module/document-persistent/index.html
+++ b/example/browser-module/document-persistent/index.html
@@ -3,12 +3,12 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document-persistent</title>
+  <title>Example: browser-module-document-persistent</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document-worker-extern-config/config.originalTitle.js b/example/browser-module/document-worker-extern-config/config.originalTitle.js
index 872f517..a1feefd 100644
--- a/example/browser-module/document-worker-extern-config/config.originalTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.originalTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document-worker-extern-config/config.primaryTitle.js b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
index 872f517..a1feefd 100644
--- a/example/browser-module/document-worker-extern-config/config.primaryTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document-worker-extern-config/index.html b/example/browser-module/document-worker-extern-config/index.html
index 28a74c4..bc5d3ae 100644
--- a/example/browser-module/document-worker-extern-config/index.html
+++ b/example/browser-module/document-worker-extern-config/index.html
@@ -3,12 +3,13 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document-worker-extern-config</title>
+  <title>Example: browser-module-document-worker-extern-config</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  // you can't load from CDN because of Same-Origin-Policy
+  import { Document } from "../../../dist/flexsearch.bundle.module.min.js";
   const dirname = import.meta.url.replace("/index.html", "");
 
   // some test data
diff --git a/example/browser-module/document-worker/index.html b/example/browser-module/document-worker/index.html
index 520f4e7..33a2530 100644
--- a/example/browser-module/document-worker/index.html
+++ b/example/browser-module/document-worker/index.html
@@ -3,12 +3,13 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document-worker</title>
+  <title>Example: browser-module-document-worker</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js";
+  // you can't load from CDN because of Same-Origin-Policy
+  import { Document } from "../../../dist/flexsearch.bundle.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document/index.html b/example/browser-module/document/index.html
index b46665a..32e2830 100644
--- a/example/browser-module/document/index.html
+++ b/example/browser-module/document/index.html
@@ -3,12 +3,12 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, height=device-height">
-  <title>Example: browser-document</title>
+  <title>Example: browser-module-document</title>
 </head>
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.compact.module.min.js";
+  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.compact.module.min.js";
 
   // some test data
   const data = [{
@@ -76,7 +76,8 @@
         "Short"
       ]
     },
-    enrich: true
+    enrich: true,
+    highlight: "<b>$1</b>"
   });
 
   // display results
diff --git a/example/browser-module/language-pack/index.html b/example/browser-module/language-pack/index.html
new file mode 100644
index 0000000..3e070a8
--- /dev/null
+++ b/example/browser-module/language-pack/index.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, height=device-height">
+  <title>Example: browser-module-language-packs</title>
+</head>
+<body style="white-space: pre">
+<script type="module">
+
+  import { Index, Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/flexsearch.compact.module.min.js";
+  import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/aff94f2b1d830e21463b237070f7e6f7eb556b82/dist/module/lang/en.js";
+
+  const encoder = new Encoder(
+    Charset.LatinSimple,
+    EnglishPreset
+  );
+
+  // create a simple index which can store id-content-pairs
+  const index = new Index({
+    tokenize: "forward",
+    encoder: encoder
+  });
+
+  // some test data
+  const data = [
+    'She doesn’t get up at six o’clock.',
+    'It\'s been raining for five hours now.'
+  ];
+
+  // add data to the index
+  data.forEach((item, id) => {
+    index.add(id, item);
+  });
+
+  // perform query
+  let result = index.search("she does not at clock");
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+    log("\n-------------------------------------\n");
+  });
+
+  // perform query
+  result = index.search("it is raining now");
+
+  // display results
+  result.forEach(i => {
+    console.log(data[i]);
+    log(data[i]);
+  });
+
+  function log(str){
+    document.body.appendChild(
+      document.createTextNode(str + "\n")
+    );
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/example/nodejs-commonjs/.document-worker-persistent/config.originalTitle.js b/example/nodejs-commonjs/.document-worker-persistent/config.originalTitle.js
new file mode 100644
index 0000000..3f28885
--- /dev/null
+++ b/example/nodejs-commonjs/.document-worker-persistent/config.originalTitle.js
@@ -0,0 +1,17 @@
+const { Encoder, Charset } = require("flexsearch");
+const EnglishPreset  = require("flexsearch/lang/en");
+
+module.exports = {
+    tokenize: "forward",
+    encoder: new Encoder(
+        Charset.LatinBalance,
+        EnglishPreset,
+        {
+            normalize: function(str){
+                return str.toLowerCase();
+            },
+            filter: false,
+            minlength: 3
+        }
+    )
+};
\ No newline at end of file
diff --git a/example/nodejs-commonjs/.document-worker-persistent/config.primaryTitle.js b/example/nodejs-commonjs/.document-worker-persistent/config.primaryTitle.js
new file mode 100644
index 0000000..3f28885
--- /dev/null
+++ b/example/nodejs-commonjs/.document-worker-persistent/config.primaryTitle.js
@@ -0,0 +1,17 @@
+const { Encoder, Charset } = require("flexsearch");
+const EnglishPreset  = require("flexsearch/lang/en");
+
+module.exports = {
+    tokenize: "forward",
+    encoder: new Encoder(
+        Charset.LatinBalance,
+        EnglishPreset,
+        {
+            normalize: function(str){
+                return str.toLowerCase();
+            },
+            filter: false,
+            minlength: 3
+        }
+    )
+};
\ No newline at end of file
diff --git a/example/nodejs-commonjs/.document-worker-persistent/data.json b/example/nodejs-commonjs/.document-worker-persistent/data.json
new file mode 100644
index 0000000..1fd5660
--- /dev/null
+++ b/example/nodejs-commonjs/.document-worker-persistent/data.json
@@ -0,0 +1,141 @@
+[
+  {
+    "tconst": "tt0000001",
+    "titleType": "short",
+    "primaryTitle": "Carmencita",
+    "originalTitle": "Carmencita",
+    "isAdult": 0,
+    "startYear": "1894",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Documentary",
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000002",
+    "titleType": "short",
+    "primaryTitle": "Le clown et ses chiens",
+    "originalTitle": "Le clown et ses chiens",
+    "isAdult": 0,
+    "startYear": "1892",
+    "endYear": "",
+    "runtimeMinutes": "5",
+    "genres": [
+      "Animation",
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000003",
+    "titleType": "short",
+    "primaryTitle": "Pauvre Pierrot",
+    "originalTitle": "Pauvre Pierrot",
+    "isAdult": 0,
+    "startYear": "1892",
+    "endYear": "",
+    "runtimeMinutes": "4",
+    "genres": [
+      "Animation",
+      "Comedy",
+      "Romance"
+    ]
+  },
+  {
+    "tconst": "tt0000004",
+    "titleType": "short",
+    "primaryTitle": "Un bon bock",
+    "originalTitle": "Un bon bock",
+    "isAdult": 0,
+    "startYear": "1892",
+    "endYear": "",
+    "runtimeMinutes": "12",
+    "genres": [
+      "Animation",
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000005",
+    "titleType": "short",
+    "primaryTitle": "Blacksmith Scene",
+    "originalTitle": "Blacksmith Scene",
+    "isAdult": 0,
+    "startYear": "1893",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Comedy",
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000006",
+    "titleType": "short",
+    "primaryTitle": "Chinese Opium Den",
+    "originalTitle": "Chinese Opium Den",
+    "isAdult": 0,
+    "startYear": "1894",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000007",
+    "titleType": "short",
+    "primaryTitle": "Corbett and Courtney Before the Kinetograph",
+    "originalTitle": "Corbett and Courtney Before the Kinetograph",
+    "isAdult": 0,
+    "startYear": "1894",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Short",
+      "Sport"
+    ]
+  },
+  {
+    "tconst": "tt0000008",
+    "titleType": "short",
+    "primaryTitle": "Edison Kinetoscopic Record of a Sneeze",
+    "originalTitle": "Edison Kinetoscopic Record of a Sneeze",
+    "isAdult": 0,
+    "startYear": "1894",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Documentary",
+      "Short"
+    ]
+  },
+  {
+    "tconst": "tt0000009",
+    "titleType": "movie",
+    "primaryTitle": "Miss Jerry",
+    "originalTitle": "Miss Jerry",
+    "isAdult": 0,
+    "startYear": "1894",
+    "endYear": "",
+    "runtimeMinutes": "45",
+    "genres": [
+      "Romance"
+    ]
+  },
+  {
+    "tconst": "tt0000010",
+    "titleType": "short",
+    "primaryTitle": "Leaving the Factory",
+    "originalTitle": "La sortie de l'usine Lumière à Lyon",
+    "isAdult": 0,
+    "startYear": "1895",
+    "endYear": "",
+    "runtimeMinutes": "1",
+    "genres": [
+      "Documentary",
+      "Short"
+    ]
+  }
+]
\ No newline at end of file
diff --git a/example/nodejs-commonjs/.document-worker-persistent/index.js b/example/nodejs-commonjs/.document-worker-persistent/index.js
new file mode 100644
index 0000000..db28b94
--- /dev/null
+++ b/example/nodejs-commonjs/.document-worker-persistent/index.js
@@ -0,0 +1,68 @@
+const { Document } = require("flexsearch");
+// const Sqlite = require("flexsearch/db/sqlite");
+// const Postgres = require("flexsearch/db/postgres");
+// const MongoDB = require("flexsearch/db/mongodb");
+// const Redis = require("flexsearch/db/redis");
+// const Clickhouse = require("flexsearch/db/clickhouse");
+
+// loading test data
+const data = require(__dirname + "/data.json");
+
+(async function(){
+
+    // create DB instance with namespace
+    //const db = new Sqlite("my-store");
+
+    // create the document index
+    const document = await new Document({
+        worker: true,
+        document: {
+            id: "tconst",
+            store: true,
+            index: [{
+                field: "primaryTitle",
+                config: __dirname + "/config.primaryTitle.js"
+            },{
+                field: "originalTitle",
+                config: __dirname + "/config.primaryTitle.js"
+            }],
+            tag: [{
+                field: "startYear"
+            },{
+                field: "genres"
+            }]
+        }
+    });
+
+    //await document.mount(db);
+    // await document.destroy();
+    // await document.mount(db);
+
+    // add test data
+    for(let i = 0; i < data.length; i++){
+        await document.add(data[i]);
+    }
+
+    // transfer changes (bulk)
+    //await document.commit();
+
+    console.log(document)
+
+    // perform a query
+    const result = await document.search({
+        query: "carmen",
+        tag: {
+            "startYear": "1894",
+            "genres": [
+                "Documentary",
+                "Short"
+            ]
+        },
+        suggest: true,
+        enrich: true,
+        merge: true
+    });
+
+    console.log(result);
+
+}());
diff --git a/example/nodejs-commonjs/.document-worker-persistent/package.json b/example/nodejs-commonjs/.document-worker-persistent/package.json
new file mode 100644
index 0000000..06712a4
--- /dev/null
+++ b/example/nodejs-commonjs/.document-worker-persistent/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-worker-persistent",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview",
+    "sqlite3": "^5.1.7"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-persistent/README.md b/example/nodejs-commonjs/basic-persistent/README.md
new file mode 100644
index 0000000..9a8d887
--- /dev/null
+++ b/example/nodejs-commonjs/basic-persistent/README.md
@@ -0,0 +1,9 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+```bash
+npm install sqlite3@5.1.7
+```
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-persistent/index.js b/example/nodejs-commonjs/basic-persistent/index.js
new file mode 100644
index 0000000..991ed34
--- /dev/null
+++ b/example/nodejs-commonjs/basic-persistent/index.js
@@ -0,0 +1,52 @@
+const { Index } = require("flexsearch");
+const Sqlite = require("flexsearch/db/sqlite");
+// const Postgres = require("flexsearch/db/postgres");
+// const MongoDB = require("flexsearch/db/mongodb");
+// const Redis = require("flexsearch/db/redis");
+// const Clickhouse = require("flexsearch/db/clickhouse");
+
+(async function(){
+
+    // create DB instance with namespace
+    const db = new Sqlite("my-store");
+
+    // create a simple index which can store id-content-pairs
+    const index = new Index({
+        tokenize: "forward"
+    });
+
+    // mount database to the index
+    await index.mount(db);
+    // await index.destroy();
+    // await index.mount(db);
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add data to the index
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // transfer changes (bulk)
+    await index.commit();
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat"
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-persistent/package.json b/example/nodejs-commonjs/basic-persistent/package.json
new file mode 100644
index 0000000..8c1358c
--- /dev/null
+++ b/example/nodejs-commonjs/basic-persistent/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview",
+    "sqlite3": "^5.1.7"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-resolver/README.md b/example/nodejs-commonjs/basic-resolver/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-commonjs/basic-resolver/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-resolver/index.js b/example/nodejs-commonjs/basic-resolver/index.js
new file mode 100644
index 0000000..0cdb3d8
--- /dev/null
+++ b/example/nodejs-commonjs/basic-resolver/index.js
@@ -0,0 +1,33 @@
+const { Index } = require("flexsearch");
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search({
+    query: "black dog or cute cat",
+    suggest: true
+});
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-resolver/package.json b/example/nodejs-commonjs/basic-resolver/package.json
new file mode 100644
index 0000000..2fbc471
--- /dev/null
+++ b/example/nodejs-commonjs/basic-resolver/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-suggestion/README.md b/example/nodejs-commonjs/basic-suggestion/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-commonjs/basic-suggestion/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-suggestion/index.js b/example/nodejs-commonjs/basic-suggestion/index.js
new file mode 100644
index 0000000..0cdb3d8
--- /dev/null
+++ b/example/nodejs-commonjs/basic-suggestion/index.js
@@ -0,0 +1,33 @@
+const { Index } = require("flexsearch");
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search({
+    query: "black dog or cute cat",
+    suggest: true
+});
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-suggestion/package.json b/example/nodejs-commonjs/basic-suggestion/package.json
new file mode 100644
index 0000000..2fbc471
--- /dev/null
+++ b/example/nodejs-commonjs/basic-suggestion/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-worker-extern-config/config.js b/example/nodejs-commonjs/basic-worker-extern-config/config.js
new file mode 100644
index 0000000..3bf5a68
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-extern-config/config.js
@@ -0,0 +1,10 @@
+import { Encoder } from "flexsearch/esm";
+
+export default {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    })
+};
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-worker-extern-config/index.js b/example/nodejs-commonjs/basic-worker-extern-config/index.js
new file mode 100644
index 0000000..4ac763d
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-extern-config/index.js
@@ -0,0 +1,38 @@
+const { Worker: WorkerIndex } = require("flexsearch");
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    // and await (!) for the worker response
+    const index = await new WorkerIndex({
+        tokenize: "forward",
+        config: __dirname + "/config.js"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-commonjs/basic-worker-extern-config/package.json b/example/nodejs-commonjs/basic-worker-extern-config/package.json
new file mode 100644
index 0000000..b98f398
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-extern-config/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-esm-document-worker",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-worker/README.md b/example/nodejs-commonjs/basic-worker/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-worker/index.js b/example/nodejs-commonjs/basic-worker/index.js
new file mode 100644
index 0000000..8c33989
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker/index.js
@@ -0,0 +1,36 @@
+const { Worker: WorkerIndex } = require("flexsearch");
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    const index = await new WorkerIndex({
+       tokenize: "forward"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-commonjs/basic-worker/package.json b/example/nodejs-commonjs/basic-worker/package.json
new file mode 100644
index 0000000..b98f398
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-esm-document-worker",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-commonjs/basic/README.md b/example/nodejs-commonjs/basic/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-commonjs/basic/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic/index.js b/example/nodejs-commonjs/basic/index.js
new file mode 100644
index 0000000..40a2338
--- /dev/null
+++ b/example/nodejs-commonjs/basic/index.js
@@ -0,0 +1,32 @@
+const { Index } = require("flexsearch");
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    // use forward when you want to match partials
+    // e.g. match "flexsearch" when query "flex"
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl mnop cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search("cute cat");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
diff --git a/example/nodejs-commonjs/basic/package.json b/example/nodejs-commonjs/basic/package.json
new file mode 100644
index 0000000..2fbc471
--- /dev/null
+++ b/example/nodejs-commonjs/basic/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-commonjs/document-persistent/README.md b/example/nodejs-commonjs/document-persistent/README.md
index 864ef27..9a8d887 100644
--- a/example/nodejs-commonjs/document-persistent/README.md
+++ b/example/nodejs-commonjs/document-persistent/README.md
@@ -1,7 +1,9 @@
 ```bash
 npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
 ```
-
+```bash
+npm install sqlite3@5.1.7
+```
 ```bash
 node index.js
 ```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/language-pack/README.md b/example/nodejs-commonjs/language-pack/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-commonjs/language-pack/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-commonjs/language-pack/index.js b/example/nodejs-commonjs/language-pack/index.js
new file mode 100644
index 0000000..8cb230e
--- /dev/null
+++ b/example/nodejs-commonjs/language-pack/index.js
@@ -0,0 +1,41 @@
+const { Index, Encoder, Charset } = require("flexsearch");
+const EnglishPreset = require("flexsearch/lang/en");
+
+const encoder = new Encoder(
+    Charset.LatinSimple,
+    EnglishPreset
+);
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward",
+    encoder: encoder
+});
+
+// some test data
+const data = [
+    'She doesn’t get up at six o’clock.',
+    'It\'s been raining for five hours now.'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+let result = index.search("she does not at clock");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+    console.log("-------------------------------------");
+});
+
+// perform query
+result = index.search("it is raining");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
diff --git a/example/nodejs-commonjs/language-pack/package.json b/example/nodejs-commonjs/language-pack/package.json
new file mode 100644
index 0000000..2fbc471
--- /dev/null
+++ b/example/nodejs-commonjs/language-pack/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/basic-persistent/README.md b/example/nodejs-esm/basic-persistent/README.md
new file mode 100644
index 0000000..9a8d887
--- /dev/null
+++ b/example/nodejs-esm/basic-persistent/README.md
@@ -0,0 +1,9 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+```bash
+npm install sqlite3@5.1.7
+```
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-persistent/index.js b/example/nodejs-esm/basic-persistent/index.js
new file mode 100644
index 0000000..f9b47d7
--- /dev/null
+++ b/example/nodejs-esm/basic-persistent/index.js
@@ -0,0 +1,49 @@
+import { Index } from "flexsearch/esm";
+import Sqlite from "flexsearch/db/sqlite";
+// import Postgres from "flexsearch/db/postgres";
+// import MongoDB from "flexsearch/db/mongodb";
+// import Redis from "flexsearch/db/redis";
+// import Clickhouse from "flexsearch/db/clickhouse";
+
+(async function(){
+
+    // create DB instance with namespace
+    const db = new Sqlite("my-store");
+
+    // create a simple index which can store id-content-pairs
+    const index = new Index({
+        tokenize: "forward"
+    });
+
+    // mount database to the index
+    await index.mount(db);
+    // await index.destroy();
+    // await index.mount(db);
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add data to the index
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // transfer changes (bulk)
+    await index.commit();
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat",
+        suggest: true
+    });
+
+    console.log(result);
+}());
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-persistent/package.json b/example/nodejs-esm/basic-persistent/package.json
new file mode 100644
index 0000000..2232aed
--- /dev/null
+++ b/example/nodejs-esm/basic-persistent/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "nodejs-commonjs-document",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview",
+    "sqlite3": "^5.1.7"
+  }
+}
diff --git a/example/nodejs-esm/basic-resolver/README.md b/example/nodejs-esm/basic-resolver/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/basic-resolver/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-resolver/index.js b/example/nodejs-esm/basic-resolver/index.js
new file mode 100644
index 0000000..8848171
--- /dev/null
+++ b/example/nodejs-esm/basic-resolver/index.js
@@ -0,0 +1,33 @@
+import { Index } from "flexsearch/esm";
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search({
+    query: "black dog or cute cat",
+    suggest: true
+});
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-resolver/package.json b/example/nodejs-esm/basic-resolver/package.json
new file mode 100644
index 0000000..9800214
--- /dev/null
+++ b/example/nodejs-esm/basic-resolver/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-commonjs-document",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/basic-suggestion/README.md b/example/nodejs-esm/basic-suggestion/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/basic-suggestion/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-suggestion/index.js b/example/nodejs-esm/basic-suggestion/index.js
new file mode 100644
index 0000000..8848171
--- /dev/null
+++ b/example/nodejs-esm/basic-suggestion/index.js
@@ -0,0 +1,33 @@
+import { Index } from "flexsearch/esm";
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl dogs cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search({
+    query: "black dog or cute cat",
+    suggest: true
+});
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-suggestion/package.json b/example/nodejs-esm/basic-suggestion/package.json
new file mode 100644
index 0000000..9800214
--- /dev/null
+++ b/example/nodejs-esm/basic-suggestion/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-commonjs-document",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/basic-worker-extern-config/README.md b/example/nodejs-esm/basic-worker-extern-config/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-extern-config/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-worker-extern-config/config.js b/example/nodejs-esm/basic-worker-extern-config/config.js
new file mode 100644
index 0000000..3bf5a68
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-extern-config/config.js
@@ -0,0 +1,10 @@
+import { Encoder } from "flexsearch/esm";
+
+export default {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    })
+};
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-worker-extern-config/index.js b/example/nodejs-esm/basic-worker-extern-config/index.js
new file mode 100644
index 0000000..5038267
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-extern-config/index.js
@@ -0,0 +1,39 @@
+import { Worker as WorkerIndex } from "flexsearch/esm";
+const dirname = import.meta.dirname;
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    // and await (!) for the worker response
+    const index = await new WorkerIndex({
+        tokenize: "forward",
+        config: dirname + "/config.js"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-esm/basic-worker-extern-config/package.json b/example/nodejs-esm/basic-worker-extern-config/package.json
new file mode 100644
index 0000000..b98f398
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-extern-config/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-esm-document-worker",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/basic-worker/README.md b/example/nodejs-esm/basic-worker/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/basic-worker/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-worker/index.js b/example/nodejs-esm/basic-worker/index.js
new file mode 100644
index 0000000..4797f39
--- /dev/null
+++ b/example/nodejs-esm/basic-worker/index.js
@@ -0,0 +1,36 @@
+import { Worker as WorkerIndex } from "flexsearch/esm";
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    const index = await new WorkerIndex({
+       tokenize: "forward"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    const result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-esm/basic-worker/package.json b/example/nodejs-esm/basic-worker/package.json
new file mode 100644
index 0000000..b98f398
--- /dev/null
+++ b/example/nodejs-esm/basic-worker/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-esm-document-worker",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/basic/README.md b/example/nodejs-esm/basic/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/basic/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/basic/index.js b/example/nodejs-esm/basic/index.js
new file mode 100644
index 0000000..961cb16
--- /dev/null
+++ b/example/nodejs-esm/basic/index.js
@@ -0,0 +1,32 @@
+import { Index } from "flexsearch/esm";
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    // use forward when you want to match partials
+    // e.g. match "flexsearch" when query "flex"
+    tokenize: "forward"
+});
+
+// some test data
+const data = [
+    'cats abcd efgh ijkl mnop qrst uvwx cute',
+    'cats abcd efgh ijkl mnop qrst cute',
+    'cats abcd efgh ijkl mnop cute',
+    'cats abcd efgh ijkl cute',
+    'cats abcd efgh cute',
+    'cats abcd cute',
+    'cats cute'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+const result = index.search("cute cat");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
diff --git a/example/nodejs-esm/basic/package.json b/example/nodejs-esm/basic/package.json
new file mode 100644
index 0000000..9800214
--- /dev/null
+++ b/example/nodejs-esm/basic/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-commonjs-document",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}
diff --git a/example/nodejs-esm/document-persistent/README.md b/example/nodejs-esm/document-persistent/README.md
index 864ef27..9a8d887 100644
--- a/example/nodejs-esm/document-persistent/README.md
+++ b/example/nodejs-esm/document-persistent/README.md
@@ -1,7 +1,9 @@
 ```bash
 npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
 ```
-
+```bash
+npm install sqlite3@5.1.7
+```
 ```bash
 node index.js
 ```
\ No newline at end of file
diff --git a/example/nodejs-esm/document/README.md b/example/nodejs-esm/document/README.md
index 864ef27..9a8d887 100644
--- a/example/nodejs-esm/document/README.md
+++ b/example/nodejs-esm/document/README.md
@@ -1,7 +1,9 @@
 ```bash
 npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
 ```
-
+```bash
+npm install sqlite3@5.1.7
+```
 ```bash
 node index.js
 ```
\ No newline at end of file
diff --git a/example/nodejs-esm/language-pack/README.md b/example/nodejs-esm/language-pack/README.md
new file mode 100644
index 0000000..864ef27
--- /dev/null
+++ b/example/nodejs-esm/language-pack/README.md
@@ -0,0 +1,7 @@
+```bash
+npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+```
+
+```bash
+node index.js
+```
\ No newline at end of file
diff --git a/example/nodejs-esm/language-pack/index.js b/example/nodejs-esm/language-pack/index.js
new file mode 100644
index 0000000..b904a73
--- /dev/null
+++ b/example/nodejs-esm/language-pack/index.js
@@ -0,0 +1,41 @@
+import { Index, Encoder, Charset } from "flexsearch/esm";
+import EnglishPreset from "flexsearch/esm/lang/en";
+
+const encoder = new Encoder(
+    Charset.LatinSimple,
+    EnglishPreset
+);
+
+// create a simple index which can store id-content-pairs
+const index = new Index({
+    tokenize: "forward",
+    encoder: encoder
+});
+
+// some test data
+const data = [
+    'She doesn’t get up at six o’clock.',
+    'It\'s been raining for five hours now.'
+];
+
+// add data to the index
+data.forEach((item, id) => {
+    index.add(id, item);
+});
+
+// perform query
+let result = index.search("she does not at clock");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+    console.log("-------------------------------------");
+});
+
+// perform query
+result = index.search("it is raining");
+
+// display results
+result.forEach(i => {
+    console.log(data[i]);
+});
diff --git a/example/nodejs-esm/language-pack/package.json b/example/nodejs-esm/language-pack/package.json
new file mode 100644
index 0000000..2fbc471
--- /dev/null
+++ b/example/nodejs-esm/language-pack/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-document",
+  "dependencies": {
+    "flexsearch": "github:nextapps-de/flexsearch#v0.8-preview"
+  }
+}