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zujian.html
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zujian.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
<script>
function mountComponent(vnode, container,anchor) {
const componentOptions = vnode.type
const {render , data } = componentOptions
const state = reactive(data())
// 将组件的render函数调用包装到effect 内
effect(()=>{
const subTree = render.call(state, state)
patch(null,subTree, container, anchor)
},{scheduler:queueJob})
const subTree = render.call(state, state)
patch(null,subTree, container, anchor)
console.log('组件挂载')
}
const queue = new Set()
let isFlushing = false
const p = Promise.resolve()
// 调度器的主要函数,用来将一个任务添加到缓存队列中,并刷新队列
function queueJob(job) {
if(!queue.has(job)){
queue.add(job)
if(!isFlushing){
isFlushing = true
p.then(() =>{
try{
queue.forEach(job => job())
} finally {
queue.clear()
isFlushing = false
}
})
}
}
}
</script>
</html>