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How to fix:uncaught referenceerror $ is not defined

Error "uncaught referenceerror $ is not defined" came out when I write jQuary.

The cause is because I wrote code using the "$" before read jQuary.

So, I read jQuary(in the case of image zepto.js) earlier .

Before fix the code

web_uncaught-referenceerror-$-is-not-defined

After fix the code

web_re_uncaught-referenceerror-is-not-defined.jpg