Function functionApiInit

src/mixin.ts:48–85

* Vuex init hook, injected into each instances init hooks list.

(this: ComponentInstance)

   */

  function functionApiInit(this: ComponentInstance) {
    const vm = this
    const $options = vm.$options
    const { setup, render } = $options

    if (render) {
      // keep currentInstance accessible for createElement
      $options.render = function (...args: any): any {
        return activateCurrentInstance(toVue3ComponentInstance(vm), () =>
          render.apply(this, args)
        )
      }
    }

    if (!setup) {
      return
    }
    if (!isFunction(setup)) {
      if (__DEV__) {
        warn(
          'The "setup" option should be a function that returns a object in component definitions.',
          vm
        )
      }
      return
    }

    const { data } = $options
    // wrapper the data option, so we can invoke setup before data get resolved
    $options.data = function wrappedData() {
      initSetup(vm, vm.$props)
      return isFunction(data)
        ? (
            data as (this: ComponentInstance, x: ComponentInstance) => object
          ).call(vm, vm)
        : data || {}
    }
  }

  function initSetup(vm: ComponentInstance, props: Record<any, any> = {}) {
    const setup = vm.$options.setup!