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jquery $(selector).ready() code running even if no element was matched

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By User



I am using this code to only run this js on certain pages.







$("body#action_new").ready(function() {

    console.log($("body#action_new"));

    console.log($("body#action_new").length);

    console.log("code is running");

}







Even though body#action_new does not exist, the code is running.





the two console.logs print out:







[]

0

code is running







What gives?


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Comments

  1. Tips For AllFebruary 1, 2012 at 3:13 AM

    you cannot call the ready except on the document, intead you can try

    $(document).ready(function(){

    if($("#action_new").size()>0){
    console.log($("body#action_new"));
    console.log($("body#action_new").length);
    console.log("code is running");
    }

    });


    as stated by @Interrobang in the comments the .size() method internally uses .length so it is advised to use .length to avoid the additional overhead of a function call, so the above code would look like

    if($("#action_new").length )>0){

    ReplyDelete
  2. Tips For AllFebruary 1, 2012 at 3:13 AM

    You cannot call .ready() on anything but document. You will get undefined behavior in any other case.


    The .ready() method can only be called on a jQuery object matching the current document, so the selector can be omitted.


    http://api.jquery.com/ready/

    ReplyDelete

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