Support displayName

[bichikim]

Version

6.0.0-beta.14

Browser and OS info

Edge 91.0.864.48

Steps to reproduce

https://github.com/vuejs/vue-next/blob/bd3cc4d2c79454736908433b607b1e1323bea67a/packages/runtime-core/src/compat/componentFunctional.ts#L57

What is expected?

displayName should be a name to display instead of a function name

What is actually happening?

it ignores the displayName

---

function getComponentTypeName (options) {
  const name = options.displayName || options.name || options._componentTag || options.__vdevtools_guessedName
  if (name) {
    return name
  }
  const file = options.__file // injected by vue-loader
  if (file) {
    return classify(basename(file, '.vue'))
  }
}