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feat(@angular-devkit/build-angular): disable critical CSS inlining by default #21880

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Merged
merged 1 commit into from
Oct 6, 2021
Merged

feat(@angular-devkit/build-angular): disable critical CSS inlining by default #21880

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2 changes: 1 addition & 1 deletion packages/angular_devkit/build_angular/src/builders/browser/schema.json
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,7 @@
"inlineCritical": {
"type": "boolean",
"description": "Extract and inline critical CSS definitions to improve first paint time.",
"default": true
"default": false
}
},
"additionalProperties": false
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18 changes: 4 additions & 14 deletions ...s/angular_devkit/build_angular/src/builders/browser/tests/options/inline-critical_spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@ describeBuilder(buildWebpackBrowser, BROWSER_BUILDER_INFO, (harness) => {
harness.expectFile('dist/index.html').content.toContain(`body{color:#000;}`);
});

it(`should extract critical css when 'optimization' is unset`, async () => {
it(`should not extract critical css when 'optimization' is unset`, async () => {
harness.useTarget('build', {
...BASE_OPTIONS,
styles: ['src/styles.css'],
Expand All @@ -50,15 +50,10 @@ describeBuilder(buildWebpackBrowser, BROWSER_BUILDER_INFO, (harness) => {
const { result } = await harness.executeOnce();

expect(result?.success).toBe(true);
harness
.expectFile('dist/index.html')
.content.toContain(
`<link rel="stylesheet" href="styles.css" media="print" onload="this.media='all'">`,
);
harness.expectFile('dist/index.html').content.toContain(`body{color:#000;}`);
harness.expectFile('dist/index.html').content.not.toContain(`<style`);
});

it(`should extract critical css when 'optimization' is true`, async () => {
it(`should not extract critical css when 'optimization' is true`, async () => {
harness.useTarget('build', {
...BASE_OPTIONS,
styles: ['src/styles.css'],
Expand All @@ -68,12 +63,7 @@ describeBuilder(buildWebpackBrowser, BROWSER_BUILDER_INFO, (harness) => {
const { result } = await harness.executeOnce();

expect(result?.success).toBe(true);
harness
.expectFile('dist/index.html')
.content.toContain(
`<link rel="stylesheet" href="styles.css" media="print" onload="this.media='all'">`,
);
harness.expectFile('dist/index.html').content.toContain(`body{color:#000;}`);
harness.expectFile('dist/index.html').content.not.toContain(`<style`);
});

it(`should not extract critical css when 'optimization' is false`, async () => {
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6 changes: 4 additions & 2 deletions packages/angular_devkit/build_angular/src/utils/normalize-optimization.ts
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Expand Up @@ -31,7 +31,8 @@ export function normalizeOptimization(
? optimization.styles
: {
minify: !!optimization.styles,
inlineCritical: !!optimization.styles,
// inlineCritical is always false unless explictly set.
inlineCritical: false,
},
fonts:
typeof optimization.fonts === 'object'
Expand All @@ -46,7 +47,8 @@ export function normalizeOptimization(
scripts: optimization,
styles: {
minify: optimization,
inlineCritical: optimization,
// inlineCritical is always false unless explictly set.
inlineCritical: false,
},
fonts: {
inline: optimization,
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