1、DOM断点调试
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<!-- <button id="create">创建detached dom 节点</button> -->
<br>
<br>
<br>
<h1 id="h1Dom">请设置DOM断点</h1>
<button id="removeH1">移除dom断点</button>
<br>
<br>
<br>
<button id="debuggerBtn">调试按钮</button>
<script>
window.onload = () => {
// // detached dom 节点
// let detachedTree;
// let create = () => {
// let ul = document.createElement('ul');
// for(let i = 0;i <= 1000; i ++) {
// let li = document.createElement('li');
// ul.append(li)
// }
// detachedTree = ul;
// console.log(detachedTree, 'detachedTree');
// }
// document.getElementById('create').addEventListener('click', create);
// dom断点
let removeH1 = () => {
document.getElementById('h1Dom').remove();
}
document.getElementById('removeH1').addEventListener('click', removeH1);
// 调试及添加log
let debuggerHandler = () => {
let showName = (name) => {
const nameIndex = name.match(/\d+/)[0];
debugger;
const info = `my name is ${name}, name index is ${nameIndex}`;
return {
nameIndex
}
}
const names = Array(1000).fill(1).map((item, index) => {
return `name${index}`;
});
names.forEach((name, index) => {
debugger;
showName(name);
})
}
document.getElementById('debuggerBtn').addEventListener('click', debuggerHandler);
// setTimeout(() => {
// debugger
// })
}
</script>
</body>
</html>
思考：MutationObserver、IntersectionObserver、ResizeObserver 还记得吗 是否和dom断点的触发是一个原理呢？
2、调试条件断点
3、日志点添加
**4、node调试 **--inspect-brk
console.log('hello nodejs')
console.log('hello yyzone laotie')
const cp = require('child_process')
console.log('i am main process')
cp.fork('./child.js', {
execArgv: ['--inspect-brk']
})
webpack插件调试 node --inspect-brk ./node_modules/webpack/bin/webpack --config ./build.js
class LogWebpackPlugin{
constructor(doneCallback,emitCallback){
this.emitCallback = emitCallback;
this.doneCallback = doneCallback;
}
apply(compiler){
console.log(compiler, 'compiler')
debugger
compiler.hooks.emit.tap('LogWebpackPlugin',()=>{
//在 emit 事件中回调 emit Callbackthis.emitCallback()
})
compiler.hooks.done.tap('LogWebpackPlugin',()=>{
//在 done 事件中回调 done Callbackthis.emitCallback()
})
compiler.hooks.compilation.tap('LogWebpackPlugin',()=>{
// compilation（'编译器'对'编译ing'这个事件的监听）
})
compiler.hooks.compile.tap('LogWebpackPlugin',()=>{
// compile（'编译器'对'开始编译'这个事件的监听）
})
}
}
module.exports = LogWebpackPlugin
5、setTimeout巧用
setTimeout(() => {
debugger
})
6、聊聊我所知道的工作中用到的
--wui-secondary-color: rgb(219 224 229);颜色切换
windows的方法直接定位到代码
