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box-shadow() mixin allow 'null' and drop support 'none' with multiple args (#30394)

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* Support 'null' and drop `none` with multiple args

* Output a warning when use 'none' with multiple arguments

* Add migration note

* Update migration.md

Co-authored-by: Mark Otto <markd.otto@gmail.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
This commit is contained in:
Shohei Yoshida
2020-08-05 03:51:19 +09:00
committed by GitHub
parent 9181c84f0f
commit e8566e10c7
2 changed files with 8 additions and 9 deletions
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16
scss/mixins/_box-shadow.scss
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@@ -2,17 +2,15 @@
@if $enable-shadows {
$result: ();
@if (length($shadow) == 1) {
// We can pass `@include box-shadow(none);`
$result: $shadow;
} @else {
// Filter to avoid invalid properties for example `box-shadow: none, 1px 1px black;`
@for $i from 1 through length($shadow) {
@if nth($shadow, $i) != "none" {
$result: append($result, nth($shadow, $i), "comma");
}
@each $value in $shadow {
@if $value != null {
$result: append($result, $value, "comma");
}
@if $value == none and length($shadow) > 1 {
@warn "The keyword 'none' must be used as a single argument.";
}
}
@if (length($result) > 0) {
box-shadow: $result;
}