在 Vue 中,我们可以通过自定义响应式系统来实现更复杂的数据处理需求。以下是一个简单的示例,演示如何在 Vue 中创建一个自定义的响应式系统:
// 定义一个响应式系统
class ReactiveSystem {constructor() {this.dependencies = new Map();}// 定义一个依赖收集函数track(target, key) {let depsMap = this.dependencies.get(target);if (!depsMap) {depsMap = new Map();this.dependencies.set(target, depsMap);}let dep = depsMap.get(key);if (!dep) {dep = new Set();depsMap.set(key, dep);}return dep;}// 定义一个依赖通知函数trigger(target, key) {const depsMap = this.dependencies.get(target);if (depsMap) {const deps = depsMap.get(key);deps.forEach((dep) => dep());}}// 定义一个响应式化函数reactive(target) {return new Proxy(target, {get: (target, key, receiver) => {const dep = this.track(target, key);Reflect.get(target, key, receiver);return Reflect.get(target, key, receiver);},
)
)
