Function mergeDataFn

packages/runtime-core/src/componentOptions.ts:1041–1058

(to: any, from: any)

}

function mergeDataFn(to: any, from: any) {
  if (!from) {
    return to
  }
  if (!to) {
    return from
  }
  return function mergedDataFn(this: ComponentPublicInstance) {
    return (
      __COMPAT__ && isCompatEnabled(DeprecationTypes.OPTIONS_DATA_MERGE, null)
        ? deepMergeData
        : extend
    )(
      isFunction(to) ? to.call(this, this) : to,
      isFunction(from) ? from.call(this, this) : from,
    )
  }
}

function mergeInject(
  to: ComponentInjectOptions | undefined,