Function customReactive

src/mixin.ts:161–183

(target: object, seen = new Set())

  }

  function customReactive(target: object, seen = new Set()) {
    if (seen.has(target)) return
    if (
      !isPlainObject(target) ||
      isRef(target) ||
      isReactive(target) ||
      isRaw(target)
    )
      return
    const Vue = getVueConstructor()
    // @ts-expect-error https://github.com/vuejs/vue/pull/12132
    const defineReactive = Vue.util.defineReactive

    Object.keys(target).forEach((k) => {
      const val = target[k]
      defineReactive(target, k, val)
      if (val) {
        seen.add(val)
        customReactive(val, seen)
      }
      return
    })
  }

  function hasReactiveArrayChild(target: object, visited = new Map()): boolean {
    if (visited.has(target)) {