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There are reasons for the mistakes on the web page.
1, Javascript errors or server errors can cause webpage errors.
2. The first possibility is the problem of the web page itself. That is, the problem of the server.
3. At present, many website pages are encoded by some templates, and not all js(javascript) scripts of the original template are necessarily used.
4, plus the level or negligence of the designer. Therefore, the js object cannot be found on the page. It will show that there is something wrong with the web page.
The second possibility is the computer itself. Such as the version of the browser. Or his page needs some plug-ins or components. And your computer is not installed or blocked. It may also cause this phenomenon.