Google PageSpeed问题

Question

error I get:

Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 254B (22% reduction).

My file

我的JavaScript文件缩小了（正如您在第二张图片中看到的那样）但是我仍然会收到错误来缩小它！ 可能出现什么问题？

Answer 1

只需简单地推迟或者aysnc这样的javascript文件

<script src="demo_defer.js" defer></script>

所有你应该好好去。