if jquery doesn't load then load jquery from here

Question

Possible Duplicate:
load jQuery from external source if not loaded

How can I set up a backup if jquery doesn't load?

I've found and tried this:

if (typeof jQuery == 'undefined') {
    alert('jquery didn't load !');
    loadScript("/here/jquery.min.js");
    .... // this is where i'd want to say load from '/here/jquery.js'
}

but I don't know how to call the src of a script within a script.

try the answer from this question: http://stackoverflow.com/questions/5415821/jquery-from-cdn — red-X, Sep 22 '12 at 21:42

score 4 · Accepted Answer · answered Sep 22 '12 at 21:45

4

This is fairly common:

<!-- Grab Google CDN's jQuery. fall back to local if necessary -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"></script>
<script>!window.jQuery && document.write(unescape('%3Cscript src="js/libs/jquery-1.4.2.js"%3E%3C/script%3E'))</script>

answered Sep 22 '12 at 21:45

Johan

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YES! exactly what I was looking for! – d-_-b Sep 22 '12 at 21:46

score 2 · Answer 2 · edited May 23 '17 at 11:50

2

Look here How can I load jQuery if it is not already loaded? or load jQuery from external source if not loaded

if(typeof jQuery=='undefined') {
    var headTag = document.getElementsByTagName("head")[0];
    var jqTag = document.createElement('script');
    jqTag.type = 'text/javascript';
    jqTag.src = 'jquery.js';
    jqTag.onload = myJQueryCode;
    headTag.appendChild(jqTag);
}

edited May 23 '17 at 11:50

Community

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answered Sep 22 '12 at 21:46

webdeveloper

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score 0 · Answer 3 · answered Sep 22 '12 at 21:42

0

put a div in regular HTML that says jquery didn't load , then hide it with jquery

<div class="jqueryError">
  <a> jquery did not load </a>
</div>

$(function(){
  $('jqueryError').hide();
});

answered Sep 22 '12 at 21:42

Scott Selby

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doesn't really answer my question of how to load jquery again from within a script – d-_-b Sep 22 '12 at 21:45
The problem with this is that even if jquery is loaded the user will see the notification until it has actually loaded. Not the biggest deal in the world but... – Johan Sep 22 '12 at 21:46
yea, i was using that for testing the scripts :) – d-_-b Sep 22 '12 at 21:50
I just saw the alert part, use Johan's answer then – Scott Selby Sep 22 '12 at 22:22

score 0 · Answer 4 · answered Sep 22 '12 at 21:48

I assume you want to load jquery if you are connected to the internet?

You could try this:

function loadJQuery() {
  if (navigator.onLine(connected)) {
    google.load("jquery", "1.4.1");
  } else {
    document.getElementById('jquery_loader').src = '/javascripts/jquery.js';
  }
 }

Remember though, if you are testing offline you could use this, but it would be useless on a website, because everyone will be connected to the internet in order to visit your website.

if jquery doesn't load then load jquery from here

4 Answers4