fix(compiler-sfc): the empty lang attribute should be treated as no l…

…ang specified (#3051)
vuejs · Feb 3, 2021 · 6d5b623 · 6d5b623
1 parent f262438
commit 6d5b623
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diff --git a/packages/compiler-sfc/__tests__/parse.spec.ts b/packages/compiler-sfc/__tests__/parse.spec.ts
@@ -139,6 +139,15 @@ h1 { color: red }
     expect(descriptor.template!.content).toBe(content)
   })
 
+  test('treat empty lang attribute as the html', () => {
+    const content = `<div><template v-if="ok">ok</template></div>`
+    const { descriptor, errors } = parse(
+      `<template lang="">${content}</template>`
+    )
+    expect(descriptor.template!.content).toBe(content)
+    expect(errors.length).toBe(0)
+  })
+
   // #1120
   test('alternative template lang should be treated as plain text', () => {
     const content = `p(v-if="1 < 2") test`

diff --git a/packages/compiler-sfc/src/parse.ts b/packages/compiler-sfc/src/parse.ts
@@ -121,6 +121,7 @@ export function parse(
               p.type === NodeTypes.ATTRIBUTE &&
               p.name === 'lang' &&
               p.value &&
+              p.value.content &&
               p.value.content !== 'html'
           ))
       ) {