I am trying to load an external javascript file from within javascript but I cannot seem to get it to work. Am I doing something wrong?
sample file of my work
function loadJs() {
var fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript")
fileref.setAttribute("src", "https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js")
document.body.appendChild(fileref); }
Perhaps you are trying to access the jQuery API before it is fully loaded. You can add a callback parameter to the loadJs function like this:
function loadJs(src, callback) {
var s = document.createElement('script');
document.getElementsByTagName('head')[0].appendChild(s);
s.onload = function() {
//callback if existent.
if (typeof callback == "function") callback();
callback = null;
}
s.onreadystatechange = function() {
if (s.readyState == 4 || s.readyState == "complete") {
if (typeof callback == "function") callback();
callback = null; // Wipe callback, to prevent multiple calls.
}
}
s.src = src;
}
loadJs('https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js', function() {
$('body').append('<p>It works!</p>');
});
Tested in chrome, FF, ie8. Fiddle: http://jsfiddle.net/Umwbx/2/
Use code similar to this:
function loadJs() {
var s = document.createElement('script');
var c = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.src = 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js';
c.parentNode.insertBefore(s, c);
}
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