Function foo

packages/compiler-core/__tests__/transforms/transformElement.spec.ts:570–575

(dir)

    const { node } = parseWithElementTransform(`<div v-foo:bar="hello" />`, {
      directiveTransforms: {
        foo(dir) {
          _dir = dir
          return {
            props: [createObjectProperty(dir.arg!, dir.exp!)],
          }
        },
      },
    })