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jquery - How to fix "TypeError: $ is not a function" error in WordPress custom page?

I created custom WordPress page via plugin where I want to toggle on/off comments using this code

<script type="text/javascript">                 
  $("comment_switch").click(function () {
    $("comments").toggleClass("hidden");
  });
</script> 

I placed it inside the <body> tag. To generate <head> tag I used standard WordPress function wp_head();. When I check the source code of the page I can see in head section <script src="http://10.1.1.6/wp-includes/js/jquery/jquery.js?ver=1.10.2" type="text/javascript"> which I thought would be enough to use jQuery.

Could someone help me to make the jQuery code work? The whole source code of the page could be found here

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1 Answer

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by (71.8m points)

You're probably missing some . class markup and the DOM ready function

jQuery(function($) { // DOM is now ready and jQuery's $ alias sandboxed

    $(".comment_switch").click(function () {
        $(".comments").toggleClass("hidden");
    });

});

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