工具函数
export function deepCloneWithReactivity(obj) {if (!obj && typeof obj !== 'object') {throw new Error('error arguments', 'deepClone');}const objClone = Array.isArray(obj) ? [] : {};if (obj && typeof obj === 'object') {for (const key in obj) {if (obj[key] && typeof obj[key] === 'object') {Vue.util.defineReactive(objClone, key, deepCloneWithReactivity(obj[key]));} else {objClone[key] = obj[key];}}}return objClone;
}Vue.util.defineReactive 对传入的对象保证是响应式
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