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Add proper wiring for swcHtmlMinimizer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /** | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| */ | ||
|
|
||
| import {minify as terserHtmlMinifier} from 'html-minifier-terser'; | ||
| import {importSwcHtmlMinifier} from './importFaster'; | ||
| import type {DocusaurusConfig} from '@docusaurus/types'; | ||
|
|
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| // Historical env variable | ||
| const SkipHtmlMinification = process.env.SKIP_HTML_MINIFICATION === 'true'; | ||
|
|
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| export type HtmlMinifier = { | ||
| minify: (html: string) => Promise<string>; | ||
| }; | ||
|
|
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| const NoopMinifier: HtmlMinifier = { | ||
| minify: async (html: string) => html, | ||
| }; | ||
|
|
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| type SiteConfigSlice = { | ||
| future: { | ||
| experimental_faster: Pick< | ||
| DocusaurusConfig['future']['experimental_faster'], | ||
| 'swcHtmlMinimizer' | ||
| >; | ||
| }; | ||
| }; | ||
|
|
||
| export async function getHtmlMinifier({ | ||
| siteConfig, | ||
| }: { | ||
| siteConfig: SiteConfigSlice; | ||
| }): Promise<HtmlMinifier> { | ||
| if (SkipHtmlMinification) { | ||
| return NoopMinifier; | ||
| } | ||
| if (siteConfig.future.experimental_faster.swcHtmlMinimizer) { | ||
| return getSwcMinifier(); | ||
| } else { | ||
| return getTerserMinifier(); | ||
| } | ||
| } | ||
|
|
||
| // Minify html with https://github.com/DanielRuf/html-minifier-terser | ||
| async function getTerserMinifier(): Promise<HtmlMinifier> { | ||
| return { | ||
| minify: async function minifyHtmlWithTerser(html) { | ||
| try { | ||
| return await terserHtmlMinifier(html, { | ||
| removeComments: false, | ||
| removeRedundantAttributes: true, | ||
| removeEmptyAttributes: true, | ||
| removeScriptTypeAttributes: true, | ||
| removeStyleLinkTypeAttributes: true, | ||
| useShortDoctype: true, | ||
| minifyJS: true, | ||
| }); | ||
| } catch (err) { | ||
| throw new Error('HTML minification failed', {cause: err as Error}); | ||
| } | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| // Minify html with @swc/html | ||
| // Not well-documented but fast! | ||
| // See https://github.com/swc-project/swc/discussions/9616 | ||
| async function getSwcMinifier(): Promise<HtmlMinifier> { | ||
| const swcHtmlMinifier = await importSwcHtmlMinifier(); | ||
| return { | ||
| minify: async function minifyHtmlWithSwc(html) { | ||
| try { | ||
| const result = await swcHtmlMinifier(Buffer.from(html), { | ||
| // Removing comments can lead to React hydration errors | ||
| // See https://x.com/sebastienlorber/status/1841966927440478577 | ||
| removeComments: false, | ||
| // TODO maybe it's fine to only keep <!-- --> React comments? | ||
| preserveComments: [], | ||
|
|
||
| // Sorting these attributes (class) can lead to React hydration errors | ||
| sortSpaceSeparatedAttributeValues: false, | ||
| sortAttributes: false, | ||
|
|
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| // @ts-expect-error: bad type https://github.com/swc-project/swc/pull/9615 | ||
| removeRedundantAttributes: 'all', | ||
| removeEmptyAttributes: true, | ||
| minifyJs: true, | ||
| minifyJson: true, | ||
| minifyCss: true, | ||
| }); | ||
| return result.code; | ||
| } catch (err) { | ||
| throw new Error('HTML minification failed', {cause: err as Error}); | ||
| } | ||
| }, | ||
| }; | ||
| } |
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