It's good practice to add comments like this in your code.
在代码中添加类似的注释是个好习惯。
It's best to comment out the old code and add comments to the new code so it will be easier to track your modifications.
最好是注释掉旧代码并对新代码添加注释，这样可以更轻松地跟踪您的修改。
The problem is, all of the whitespace, line breaks, and comments that you add to your code increase the file size of the script and the load time of your application.
问题是，加入的所有空格、分行符、注释都增加了脚本文件大小和应用程序的加载时间。
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