worker index basic support export/import

example/nodejs-commonjs/basic-worker-export-import/config.js

@@ -0,0 +1,29 @@
+const { Encoder } = require("flexsearch");
+const fs = require("fs").promises;
+
+(async function(){
+    await fs.mkdir("./export/").catch(e => {});
+}());
+
+module.exports = {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    }),
+    export: async function(key, data){
+
+        await fs.writeFile("./export/" + key, data, "utf8");
+    },
+    import: async function(index){
+
+        let files = await fs.readdir("./export/");
+        files = await Promise.all(files);
+
+        for(let i = 0; i < files.length; i++){
+            const data = await fs.readFile("./export/" + files[i], "utf8");
+            index.import(files[i], data);
+        }
+    }
+};