Pulling already loaded JS into a local variable

Question

The source of linked to .js is not available via the DOM currently.

var b = document.createElement("script");
b.type= "text/javascript";
b.src = "foo/source/ArcJ.js"  // dynamically load .js file

Can I just do

var c = b.src // probably not

I think this would just give me the path...I want the source...i.e. all the code in a string.

Is there a way to do this with out using ajax? Shouldn't this be a simple DOM Pull...

document.getElementById(b.id).source_code

?

Not sure how to do it, but b.src is probably only going to be the string "foo/source/ArcJ.js" and not the file content itself. — James, Jun 07 '12 at 14:46
Look my answer here : http://stackoverflow.com/questions/10932226/get-source-code-from-javascript/10933419#10933419 — Alexandre Khoury, Jun 07 '12 at 14:51
@Hiro Protagonist: Yes, but a `` is always empty, so my idea won't work anyway. I'm sorry. — pimvdb, Jun 07 '12 at 14:57

Shanimal · Answer 1 · 2012-06-07T14:58:22.560

2

.src is the url, so you just load the url from that using an ajax request...

$.get($("script[src*=jquery]").attr("src"),function(data){
    console.log(data)
})

edited Jun 07 '12 at 14:58

answered Jun 07 '12 at 14:46

Shanimal

11,517
7
63
76

1

You better add `script` tag to the selector, to boost it a little. – gdoron Jun 07 '12 at 14:47
btw, if you script tag has code in it you can just call $("script").txt() – Shanimal Jun 07 '12 at 14:54

score 0 · Accepted Answer · edited May 23 '17 at 11:55

Took from How do I get source code from a webpage? (written by me)

There is three way in javascript :

Firstly, by XMLHttpRequest : http://jsfiddle.net/635YY/1/

var url="../635YY",xmlhttp;//Remember, same domain
if("XMLHttpRequest" in window)xmlhttp=new XMLHttpRequest();
if("ActiveXObject" in window)xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
xmlhttp.open('GET',url,true);
xmlhttp.onreadystatechange=function()
{
    if(xmlhttp.readyState==4)alert(xmlhttp.responseText);
};
xmlhttp.send(null);

Secondly, by iFrames : http://jsfiddle.net/XYjuX/1/

var url="../XYjuX";//Remember, same domain
var iframe=document.createElement("iframe");
iframe.onload=function()
{
    alert(iframe.contentWindow.document.body.innerHTML);
}
iframe.src=url;
iframe.style.display="none";
document.body.appendChild(iframe);

Thirdly, by jQuery : http://jsfiddle.net/edggD/2/

$.get('../edggD',function(data)//Remember, same domain
{
    alert(data);
});

If you feel this question is a duplicate, you may rather want to close the question as such. — pimvdb, Jun 07 '12 at 14:58
It is loaded into the DOM already....is there some principle that would be broken by doing a direct DOM pull? — , Jun 07 '12 at 14:59

Pulling already loaded JS into a local variable

2 Answers2