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fix(compiler-sfc): prefix digit css custom properties #13870

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Merged
merged 1 commit into from
Sep 24, 2025
+6 −5
Merged

fix(compiler-sfc): prefix digit css custom properties #13870

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8 changes: 4 additions & 4 deletions packages/compiler-sfc/__tests__/cssVars.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -109,8 +109,8 @@ describe('CSS vars injection', () => {
{ isProd: true },
)
expect(content).toMatch(`_useCssVars(_ctx => ({
"4003f1a6": (_ctx.color),
"41b6490a": (_ctx.font.size)
"v4003f1a6": (_ctx.color),
"v41b6490a": (_ctx.font.size)
}))}`)

const { code } = compileStyle({
Expand All @@ -124,8 +124,8 @@ describe('CSS vars injection', () => {
})
expect(code).toMatchInlineSnapshot(`
".foo {
color: var(--4003f1a6);
font-size: var(--41b6490a);
color: var(--v4003f1a6);
font-size: var(--v41b6490a);
}"
`)
})
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3 changes: 2 additions & 1 deletion packages/compiler-sfc/src/style/cssVars.ts
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Expand Up @@ -40,7 +40,8 @@ function genVarName(
isSSR = false,
): string {
if (isProd) {
return hash(id + raw)
// hash must not start with a digit to comply with CSS custom property naming rules
return hash(id + raw).replace(/^\d/, r => `v${r}`)
} else {
// escape ASCII Punctuation & Symbols
// #7823 need to double-escape in SSR because the attributes are rendered
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