fix(parser): allow multiple slots with new syntax (#9785)

* fix(#9781): non greedy `dynamicArgAttribute` RegExp 

* test(parser): add test case for multiple dynamic slot names

* test: add test with value

Co-authored-by: Eduardo San Martin Morote <posva13@gmail.com>

src/compiler/parser/html-parser.js

@@ -15,7 +15,7 @@ import { unicodeRegExp } from 'core/util/lang'
 
 // Regular Expressions for parsing tags and attributes
 const attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
-const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
+const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
 const ncname = `[a-zA-Z_][\\-\\.0-9_a-zA-Z${unicodeRegExp.source}]*`
 const qnameCapture = `((?:${ncname}\\:)?${ncname})`
 const startTagOpen = new RegExp(`^<${qnameCapture}`)

test/unit/modules/compiler/parser.spec.js

@@ -569,6 +569,26 @@ describe('parser', () => {
     })
   })
 
+  // #9781
+  it('multiple dynamic slot names without warning', () => {
+    const ast = parse(`<my-component>
+      <template #[foo]>foo</template>
+      <template #[data]="scope">scope</template>
+      <template #[bar]>bar</template>
+    </my-component>`, baseOptions)
+
+    expect(`Invalid dynamic argument expression`).not.toHaveBeenWarned()
+    expect(ast.scopedSlots.foo).not.toBeUndefined()
+    expect(ast.scopedSlots.data).not.toBeUndefined()
+    expect(ast.scopedSlots.bar).not.toBeUndefined()
+    expect(ast.scopedSlots.foo.type).toBe(1)
+    expect(ast.scopedSlots.data.type).toBe(1)
+    expect(ast.scopedSlots.bar.type).toBe(1)
+    expect(ast.scopedSlots.foo.attrsMap['#[foo]']).toBe('')
+    expect(ast.scopedSlots.bar.attrsMap['#[bar]']).toBe('')
+    expect(ast.scopedSlots.data.attrsMap['#[data]']).toBe('scope')
+  })
+
   // #6887
   it('special case static attribute that must be props', () => {
     const ast = parse('<video muted></video>', baseOptions)