for example:
<p class="a"></p>.a{color:#f00}
.b{color:#f00}There is no tool or plug-in (vscode, sublime text supports replacement), automatically or manually delete the line .b{color:#f00} in css?
I remember that a long, long, long time ago, Microsoft had Expression Web 4, which was a tool that could compete with DreamViewer, but that was all many years ago. Don't consider it.
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Webstorm code review, if there are no references, there will be a prompt, but you have to handle it manually
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
