The defer attribute causes the page that references JQuery to report the error 'The browser cannot open the website xxx, the operation was aborted'_javascript skills

Reference:

Defer attribute in Script
If you are someone who is more concerned about system performance, I think you will be interested in the defer attribute in the Script script.
The defer attribute in script is false by default. According to the description in the DHTML Programming Guide, the Defer attribute is written like this:
Using the attribute at design time can improve the download performance of a page because the browser does not need to parse and execute the script and can continue downloading and parsing the page instead.
In other words: if you add the defer attribute when writing a script, then the browser does not have to process it immediately when downloading the script, but continues to download and parse the page, which will Improve download performance.
There are many such situations. For example, if you define a lot of JavaScript variables, or write a lot of scripts in the reference file (.inc) that need to be processed, you might as well add the defer attribute to these scripts, which will definitely help improve performance.
For example:

Because defer The attribute defaults to false, so here