如何在满足jquery中的条件时包括一个js文件

Question

 <script> jQuery(document).ready(function(){ jQuery(".tabmenu li").click(function(){ var current_tab = jQuery(this).attr("class"); var res = current_tab.replace(" active_tab",""); if(res == 'tabmenu-8') { } }); }); </script> 

I have a script, which is written above. What I want is, I want to include a js file on satisfying the if condition. How can I do that? I tried different methods I found while searching in google, but nothing helped me.

This is the script I want to add there

<script type='text/javascript' src='//code.jquery.com/jquery-1.9.1.js'></script>

Answer 1

try this in if condition:

var myscript = document.createElement('script');
myscript.setAttribute('src','http://code.jquery.com/jquery-1.9.1.js');
document.head.appendChild(myscript);

Answer 2

Adding additional scripts from JavaScript is actually quite easy. Your create a script-element and set the type and src attributes and just add it to the head (or body, it doesn't really matter)

var newScript = document.createElement("script");
newScript.setAttribute("type","text/javascript");
newScript.setAttribute("src","http://code.jquery.com/jquery-1.9.1.js");
document.head.appendChild(newScript);

Answer 3

You can use .append() :

$('head').append($('<script>').attr('type', 'text/javascript').attr('src', '//code.jquery.com/jquery-1.9.1.js'));

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If you've included jQuery, it's better to use $.getScript() :

$.getScript("http://code.jquery.com/jquery-1.9.1.js");