how to set a variable for external javascript file after the js file is defined?

Question

I'm using jQuery Mobile Ajax navigation feature, And I need to change a variable that is defined inside external js file, So I can't put my definition before I load that js file...

So, How to change value of a variable for external javascript file after the js file is defined?

(That external js file includes events)

So this question is not duplicate of that question.

Update

My JS File contains events, something like this: $(document).on('mousemove','#main',function() { /*something*/} );

And I need that variable. Is it possible to pass variable to that?

I have tried simply changing that variable i = 5;, but I'm getting undefined error.

Update 2

The external JS file is something for some pages that are almost same, but a little different, just one or two parameters.

And I simply want to pass the parameters to that JS file. Is it possible? How?

@zerkms I tried it, but didn't work... (Still getting undefined error) — Mahdi Ghiasi
– Mahdi Ghiasi, Commented Sep 11, 2012 at 23:07
that's why I said "it depends", because it really depends on what and how you do in that external file. — zerkms
– zerkms, Commented Sep 11, 2012 at 23:08
Question updated. What other information should I put on the question? — Mahdi Ghiasi
– Mahdi Ghiasi, Commented Sep 11, 2012 at 23:10

Matt Huggins · Accepted Answer · 2012-09-11 23:13:20Z

4

Let's assume http://www.example.com/external.js defines variable foo, which you want to change.

<script src="http://www.example.com/external.js"></script>
<script type="text/javascript">
    foo = "my new value";
</script>

This assumes that external.js defined foo in the global scope. If it's defined in an anonymous function or similar, you won't be able to change the value.

answered Sep 11, 2012 at 23:13

Matt Huggins

83.7k37 gold badges153 silver badges220 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Mahdi Ghiasi Over a year ago

If it's defined in an anonymous function or similar, you won't be able to change the value. Thanks for it!

Niet the Dark Absol · Accepted Answer · 2012-09-11 23:07:42Z

1

Depending on what you're doing, you can just set the variable and it'll work. Example:

// JS file
blah = "Hello";
function doSomething() {
    alert(blah);
}

// HTML file
blah = "I'm a fish";
doSomething(); // alerts "I'm a fish";

Alternatively, pass the variable as an argument to relevant functions instead of using global variables.

answered Sep 11, 2012 at 23:07

Niet the Dark Absol

326k86 gold badges480 silver badges604 bronze badges

Collectives™ on Stack Overflow

how to set a variable for external javascript file after the js file is defined?

Update

Update 2

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

Update

Update 2

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related