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The method is as follows:
1, put all <script> tags as close to the bottom of the <body> tag position to ensure that the page before the script to complete the resolution to minimize the impact of the entire page download
2, limit the total number of pages <script> can also improve performance. Whenever page parsing encounters a <script> tag, there is a period of time for code execution. Minimizing these latency times can improve the overall performance of the page.
3, reduce the number of references to external script files. Each HTTP request generates an additional performance burden, and downloading a 100KB file is faster than downloading four 25KB of files. In summary, reduce the number of references to external script files.
4, non-blocking way to download the script. After the page completes loading, then load JavaScript source
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