Boss, help me to see what the problem is. It's about jquery.

?


jquery,:

clipboard.png
?jquery

clipboard.png

clipboard.png

Feb.28,2021

hints $is not definded you don't introduce jquery bar


you enter $or jQuery in console


put Jquery in front of all js code


jQuery


1.jquery does not introduce
2.jquery loading order after your code

F12 just check whether the jquery path you loaded is correct
clipboard.png


clipboard.png

Alas, jQuery resource load error: 404. Check whether the file exists under the relevant path


did not introduce jq file


404, path error


first of all, 404 has been prompted not to find the file, first of all, make sure that the path is correct, if it is not modified correctly. If correct, try appending the attribute type= "text/javascript"

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