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fix: ensure unique classNames for different orders of pseudo class an…
…d elements
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /** | ||
| * Copyright (c) Meta Platforms, Inc. and affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| * | ||
| * @flow strict | ||
| */ | ||
|
|
||
| import { arraySort } from './object-utils'; | ||
|
|
||
| export const sortPseudos = ( | ||
| pseudos: $ReadOnlyArray<string>, | ||
| ): $ReadOnlyArray<string> => { | ||
| if (pseudos.length < 2) { | ||
| return pseudos; | ||
| } | ||
|
|
||
| return pseudos | ||
| .reduce( | ||
| (acc, pseudo) => { | ||
| if (pseudo.startsWith('::')) { | ||
| return [...acc, pseudo]; | ||
| } | ||
|
|
||
| const lastElement = acc[acc.length - 1]; | ||
| const allButLast = acc.slice(0, acc.length - 1); | ||
| if (Array.isArray(lastElement)) { | ||
| return [...allButLast, [...lastElement, pseudo]]; | ||
| } else { | ||
| return [...allButLast, lastElement, [pseudo]].filter(Boolean); | ||
| } | ||
| }, | ||
| [] as $ReadOnlyArray<string | $ReadOnlyArray<string>>, | ||
| ) | ||
| .flatMap((pseudo) => { | ||
| if (Array.isArray(pseudo)) { | ||
| return arraySort(pseudo, stringComparator); | ||
| } | ||
| return [pseudo]; | ||
| }); | ||
| }; | ||
|
|
||
| export const sortAtRules = ( | ||
| atRules: $ReadOnlyArray<string>, | ||
| ): $ReadOnlyArray<string> => arraySort(atRules); | ||
|
|
||
| // a comparator function that sorts strings alphabetically | ||
| // but where `default` always comes first | ||
| const stringComparator = (a: string, b: string): number => { | ||
| if (a === 'default') { | ||
| return -1; | ||
| } | ||
| if (b === 'default') { | ||
| return 1; | ||
| } | ||
| return a.localeCompare(b); | ||
| }; |