ReferenceError can’t find variable: $ [duplicate]

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Is the jquery javascript file loaded before you call anything with it -> using the selector $?
Please check with Chrome or Firefox+firebug if the jquery library is loaded correctly. Maybe the path could be not correct

After that, try to place your code into:

$(document).ready(function() {
  // put all your jQuery goodness in here.
});

This will make sure that ‘// put all your jQuery goodness in here.’ will be executed after jQuery has been loaded.

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