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Add transform function for @starting-style and @position-try rules
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‎.changeset/tender-beans-cheat.md‎

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---
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'@vanilla-extract/css': minor
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---
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Add support for `@starting-style` and `@position-try` rules

‎packages/css/src/transformCss.test.ts‎

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@@ -2500,6 +2500,363 @@ describe('transformCss', () => {
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}
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`);
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});
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it('should handle @position-try declaration', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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display: 'flex',
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'@position-try': {
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'--custom-left': {
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positionArea: 'left',
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width: '100px',
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margin: '0 10px 0 0',
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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.testClass {
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display: flex;
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}
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@position-try --custom-left {
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.testClass {
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position-area: left;
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width: 100px;
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margin: 0 10px 0 0;
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}
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}
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`);
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});
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it('should handle @position-try inside media queries', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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display: 'flex',
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'@media': {
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'screen and (min-width: 700px)': {
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'@position-try': {
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'--custom-left': {
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positionArea: 'left',
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width: '100px',
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margin: '0 10px 0 0',
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},
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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.testClass {
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display: flex;
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}
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@media screen and (min-width: 700px) {
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@position-try --custom-left {
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.testClass {
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position-area: left;
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width: 100px;
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margin: 0 10px 0 0;
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}
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}
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}
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`);
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});
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it('should handle @position-try inside container queries', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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display: 'flex',
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'@container': {
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'sidebar (min-width: 700px)': {
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'@position-try': {
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'--custom-left': {
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positionArea: 'left',
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width: '100px',
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margin: '0 10px 0 0',
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},
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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.testClass {
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display: flex;
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}
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@container sidebar (min-width: 700px) {
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@position-try --custom-left {
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.testClass {
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position-area: left;
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width: 100px;
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margin: 0 10px 0 0;
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}
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}
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}
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`);
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});
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it('should handle @position-try inside a layer', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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'@layer': {
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'mock-layer': {
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'@position-try': {
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'--custom-left': {
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positionArea: 'left',
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width: '100px',
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margin: '0 10px 0 0',
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},
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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@layer mock-layer;
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@layer mock-layer {
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@position-try --custom-left {
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.testClass {
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position-area: left;
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width: 100px;
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margin: 0 10px 0 0;
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}
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}
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}
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`);
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});
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it('should throw an error when a at-rule is use inside @position-try scope', () => {
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expect(() =>
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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display: 'flex',
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'@position-try': {
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'--custom-left': {
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positionArea: 'left',
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width: '100px',
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margin: '0 10px 0 0',
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'@media': {
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'screen and (min-width: 700px)': {
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display: 'grid',
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},
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},
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},
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},
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},
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},
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],
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}),
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).toThrowErrorMatchingInlineSnapshot(
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'Nested at-rules (e.g. "@media") are not allowed inside @position-try block.',
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);
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});
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it('should handle @starting-style declaration', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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opacity: 1,
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top: '100%',
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'@starting-style': {
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opacity: 0,
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top: '50%',
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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.testClass {
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opacity: 1;
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top: 100%;
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@starting-style {
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opacity: 0;
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top: 50%;
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}
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}
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`);
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});
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it('should handle @starting-style inside media queries', () => {
2728+
expect(
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transformCss({
2730+
composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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display: 'flex',
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'@media': {
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'screen and (min-width: 700px)': {
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top: '0',
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'@starting-style': {
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top: '100%',
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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.testClass {
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display: flex;
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}
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@media screen and (min-width: 700px) {
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.testClass {
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top: 0;
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@starting-style {
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top: 100%;
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}
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}
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}
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`);
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});
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it('should handle @starting-style inside container queries', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
2771+
{
2772+
type: 'local',
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selector: 'testClass',
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rule: {
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'@container': {
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'sidebar (min-width: 700px)': {
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top: '0',
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'@starting-style': {
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top: '100%',
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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@container sidebar (min-width: 700px) {
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.testClass {
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top: 0;
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@starting-style {
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top: 100%;
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}
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}
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}
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`);
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});
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it('should handle @starting-style inside a layer', () => {
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expect(
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
2805+
{
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type: 'local',
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selector: 'testClass',
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rule: {
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'@layer': {
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'mock-layer': {
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top: '0',
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'@starting-style': {
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top: '100%',
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},
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},
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},
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},
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},
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],
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}).join('\n'),
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).toMatchInlineSnapshot(`
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@layer mock-layer;
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@layer mock-layer {
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.testClass {
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top: 0;
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@starting-style {
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top: 100%;
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}
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}
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}
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`);
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});
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it('should throw an error when a at-rule is use inside @starting-style scope', () => {
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expect(() =>
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transformCss({
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composedClassLists: [],
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localClassNames: ['testClass'],
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cssObjs: [
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{
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type: 'local',
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selector: 'testClass',
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rule: {
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'@starting-style': {
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// @ts-expect-error - Using a media query inside @starting-style for testing purposes
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'@media': {
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'screen and (min-width: 700px)': {
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display: 'grid',
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},
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},
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},
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},
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},
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],
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}),
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).toThrowErrorMatchingInlineSnapshot(
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'Nested at-rules (e.g. "@media") are not allowed inside @starting-style.',
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);
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});
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});
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endFileScope();

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