Method deleteProperty

packages/reactivity/src/baseHandlers.ts:194–205

(
    target: Record<string | symbol, unknown>,
    key: string | symbol,
  )

  }

  deleteProperty(
    target: Record<string | symbol, unknown>,
    key: string | symbol,
  ): boolean {
    const hadKey = hasOwn(target, key)
    const oldValue = target[key]
    const result = Reflect.deleteProperty(target, key)
    if (result && hadKey) {
      trigger(target, TriggerOpTypes.DELETE, key, undefined, oldValue)
    }
    return result
  }

  has(target: Record<string | symbol, unknown>, key: string | symbol): boolean {
    const result = Reflect.has(target, key)