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feat(core): 实现响应性系统的核心功能

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- 添加 effect 函数用于创建响应性副作用
- 实现 ReactiveEffect 类来管理响应性执行
- 添加 track 函数用于依赖收集
- 添加 trigger 函数用于触发依赖更新
- 在 baseHandlers 中实现 Proxy 的 get 和 set 拦截器
- 将 effect 导出到 vue 包的入口文件
- 添加 dev 脚本用于监听构建
- 更新示例文件展示响应性功能的使用
- 修复 README.md 中代码块格式问题
This commit is contained in:
dj
2026-02-03 22:18:21 +08:00
parent d3fea3f244
commit 5a24b61edf
7 changed files with 73 additions and 7 deletions
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2
README.md
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@@ -1,5 +1,6 @@
# .prettierrc # .prettierrc
```
{ {
"semi": false,// 结尾无分号 "semi": false,// 结尾无分号
"singleQuote": true,// 单引号 "singleQuote": true,// 单引号
@@ -7,3 +8,4 @@
"trailingComma": "none",// 不添加尾随逗号 "trailingComma": "none",// 不添加尾随逗号
"arrowParens": "avoid"// 省略箭头函数的括号 "arrowParens": "avoid"// 省略箭头函数的括号
} }
```

1
package.json
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@@ -3,6 +3,7 @@
"version": "1.0.0", "version": "1.0.0",
"main": "index.js", "main": "index.js",
"scripts": { "scripts": {
"dev": "rollup -c -w",
"build": "rollup -c", "build": "rollup -c",
"test": "echo \"Error: no test specified\" && exit 1" "test": "echo \"Error: no test specified\" && exit 1"
}, },

30
packages/reactivity/src/baseHandlers.ts
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@@ -1,4 +1,32 @@
/** /**
* 响应性的handler * 响应性的handler
*/ */
export const mutableHandlers: ProxyHandler<object> = {} import { track, trigger } from './effect'
const get = createGetter()
function createGetter() {
return function get(target: object, key: string | symbol, receiver: object) {
const res = Reflect.get(target, key, receiver)
track(target, key)
return res
}
}
const set = createSetter()
function createSetter() {
return function set(
target: object,
key: string | symbol,
value: unknown,
receiver: object
) {
const result = Reflect.set(target, key, value, receiver)
trigger(target, key, value)
return result
}
}
export const mutableHandlers: ProxyHandler<object> = {
get,
set
}

33
packages/reactivity/src/effect.ts Normal file
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@@ -0,0 +1,33 @@
export function effect<T = any>(fn: () => T) {
const _effect = new ReactiveEffect(fn)
_effect.run()
}
export let activeEffect: ReactiveEffect | undefined
export class ReactiveEffect<T = any> {
constructor(public fn: () => T) {}
run() {
activeEffect = this
return this.fn()
}
}
/**
* 收集依赖
* @param target
* @param key
*/
export function track(target: object, key: unknown) {
console.log('收集依赖 track')
}
/**
* 触发依赖
* @param target
* @param key
* @param newValue
*/
export function trigger(target: object, key: unknown, newValue: unknown) {
console.log('触发依赖 trigger')
}

1
packages/reactivity/src/index.ts
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@@ -1 +1,2 @@
export { reactive } from './reactive' export { reactive } from './reactive'
export { effect } from './effect'

9
packages/vue/examples/reactivity/reactive.html
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@@ -6,14 +6,15 @@
<script src="../../dist/vue.js"></script> <script src="../../dist/vue.js"></script>
</head> </head>
<body> <body>
<div id="app"></div>
</body> </body>
<script> <script>
const { reactive } = Vue const { reactive,effect } = Vue
console.log(reactive)
const obj=reactive({ const obj=reactive({
name:'张三' name:'张三'
}) })
console.log(obj) effect(()=>{
document.querySelector('#app').innerText=obj.name
})
</script> </script>
</html> </html>

2
packages/vue/src/index.ts
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@@ -1 +1 @@
export { reactive } from '@vue/reactivity' export { reactive, effect } from '@vue/reactivity'