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include javascript file to javascript file....

Posted on 2008-10-26
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Last Modified: 2008-10-27
Hello Experts,
I have a web project with a big number of pages. Each page has numerous javascript files included (libraries and my own) this way:
<script type="text/javascript" src="somefile.js"></script>

I don't like to have this kind of mess... is it possible to include only one js file, and inside that file to have all the libraries included?
If yes, what is the syntax?
0
Comment
Question by:vvvlad42
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6 Comments
 
LVL 16

Assisted Solution

by:Gyanendra Singh
Gyanendra Singh earned 450 total points
ID: 22810475
At the beginning of each .js file importing another file:
(this file defines a class called 'myclass' and 'km_' is just the prefix I
use for my functions or classes)

----------------------------------------------------------------
// myclass.js

if (typeof(km_scripts) == 'undefined') var km_scripts = new Object();
km_myclass_import('importedfile.js');

function km_myclass_import(jsFile) {
if (km_scripts[jsFile] != null) return;
var scriptElt = document.createElement('script');
scriptElt.type = 'text/javascript';
scriptElt.src = jsFile;
document.getElementsByTagName('head')[0].appendChild(scriptElt);
km_scripts[jsFile] = jsFile; // or whatever value your prefer
}

function km_myclass_alert() {
alert(importedValue);
}

-------------------------------------------------------------
The imported file importedfile.js:

// importedfile.js

var importedValue = 'The file was imported';

----------------------------------------------------------------
The HTML file to test it :

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<script language="javascript" src="myclass.js" />
<TITLE></TITLE>
</HEAD>
<BODY>
<input type="button" value="Test!" onclick="km_myclass_alert()" />
</BODY>
</HTML>
0
 
LVL 16

Expert Comment

by:sh0e
ID: 22810478

function loadJS(src) {  
var script = document.createElement('script');  
script.src = src;  
script.type = 'text/javascript';  
var head = document.getElementsByTagName('head')[0];  
if (!head) {  
head = document.body.parentNode.appendChild(document.createElement('head'));  
}  
head.appendChild(script);  
}
 
loadJS('somefile.js');

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0
 

Author Comment

by:vvvlad42
ID: 22810506
So I'll have to do all that for each file? I have at least 6....
0
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LVL 16

Expert Comment

by:sh0e
ID: 22810570
You just have to call loadJS('somefile.js')
The function only has to be declared once.

You can just put everything into one JS file.
BondinASP has exactly the same code, except he added a lot of wrapping code.

If you would like to declare an array of files to include, put this into a .js file and include it:
var myscripts = [
"somefile.js","another.js","twofold.js"
];
 
//No need to modify code below
function loadJS(src) {  
var script = document.createElement('script');  
script.src = src;  
script.type = 'text/javascript';  
var head = document.getElementsByTagName('head')[0];  
if (!head) {  
head = document.body.parentNode.appendChild(document.createElement('head'));  
}  
head.appendChild(script);  
}
 
for(int i=0;i<myscripts.length;i++) loadJS(myscripts[i]);

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0
 
LVL 16

Accepted Solution

by:
sh0e earned 1050 total points
ID: 22810574
Sorry, made a typo above.  Used int instead of var.
var myscripts = [
"somefile.js","another.js","twofold.js"
];
 
//No need to modify code below
function loadJS(src) {  
var script = document.createElement('script');  
script.src = src;  
script.type = 'text/javascript';  
var head = document.getElementsByTagName('head')[0];  
if (!head) {  
head = document.body.parentNode.appendChild(document.createElement('head'));  
}  
head.appendChild(script);  
}
 
for(var i=0;i<myscripts.length;i++) loadJS(myscripts[i]);

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0
 

Author Comment

by:vvvlad42
ID: 22810663
Hi,
Just a small clarification...
What if my js file is located in a subfolder? how do I provide a path?

Thank you again
0

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