feat(effects): 添加懒执行选项和调度器支持

- 引入 ReactiveEffectOptions 接口，支持 lazy 和 scheduler 配置 - 实现懒执行功能，当 lazy 为 true 时不立即运行 effect - 添加新的示例文件 lazy.html 演示懒执行效果 - 优化 effect 函数参数结构，支持可选配置项
2026-02-09 18:23:44 +08:00
parent c07431db08
commit 62e40e7292
2 changed files with 36 additions and 2 deletions
--- a/packages/reactivity/src/effect.ts
+++ b/packages/reactivity/src/effect.ts
@@ -13,10 +13,16 @@ type KeyToDepMap = Map<any, Dep>
 */
 const targetMap = new WeakMap<any, KeyToDepMap>()

-export function effect<T = any>(fn: () => T) {
+export interface ReactiveEffectOptions {
+  lazy?: boolean
+  schedler?: EffectScheduler
+}
+export function effect<T = any>(fn: () => T, options?: ReactiveEffectOptions) {
  const _effect = new ReactiveEffect(fn)
+  if (!options || !options.lazy) {
    _effect.run()
  }
+}

 export let activeEffect: ReactiveEffect | undefined

--- a/packages/vue/examples/reactivity/lazy.html
+++ b/packages/vue/examples/reactivity/lazy.html
@@ -0,0 +1,28 @@
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Document</title>
+    <script src="../../dist/vue.js"></script>
+</head>
+<body>
+<div id="app"></div>
+</body>
+<script>
+    const { reactive,effect } = Vue
+    const obj=reactive({
+       count:1
+    })
+    let {name}=obj
+    console.log('name',name);
+    
+    effect(()=>{
+        document.querySelector('#app').innerText=name
+    })
+    setTimeout(()=>{
+        obj.name='李四'
+        
+    console.log('obj',obj);
+    },2000)
+</script>
+</html>