How do I put a variable in a string using javascript

Question

How do I put a variable in a string in JavaScript?

Example:

$('#contactForm').animate({"marginLeft": "+=680px"}, "slow");

I would like to use in a variable instead of 680px, is there a way to do this?

Quentin · Accepted Answer · 2012-05-10 16:06:34Z

3

As with most languages that don't have sigals, you can't perform interpolation, you have to concatenate multiple strings.

"foo" + "bar" + "baz"
"foo" + string_var + "baz"
"+=" + string_var + "px"

answered May 10, 2012 at 16:06

Quentin

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Comments

Janos · Accepted Answer · 2012-05-10 16:08:04Z

1

var size = "680px";
$('#contactForm').animate({"marginLeft": "+="+size}, "slow");

answered May 10, 2012 at 16:08

Janos

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Brian Dukes · Accepted Answer · 2012-05-10 16:06:52Z

0

You can use the + operator to concatenate your value in a variable to the "+=" string:

$('#contactForm').animate({"marginLeft": "+=" + size}, "slow");

answered May 10, 2012 at 16:06

Brian Dukes

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epascarello · Accepted Answer · 2012-05-11 14:27:38Z

0

var theWidth = "680px"
$('#contactForm').animate({marginLeft: "+=" + theWidth}, "slow");

epascarello

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answered May 10, 2012 at 16:07

Madara's Ghost

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