How to set a CSS property with a variable in JQuery?

Question

I need to set the CSS property of width as the same size as the browser's current width. To do this, I did var setWidth = $(window).width(), but I don't know how to apply this to my current code, which is something like this:

$(document).ready(function(){
    $("#backgroundImg").css("width", ""); 
});

Is there any way to do this? I'm new to JQuery so I might just be really amateur.

Oleksandr T. · Accepted Answer · 2015-07-21 18:36:40Z

7

Try this

$(document).ready(function() {
    var setWidth = $(window).width();
    $("#backgroundImg").css("width", setWidth + 'px'); 
});

or you can use $.width

$(document).ready(function() {
    $('#backgroundImg').width( $(window).width() )
});

edited Jul 21, 2015 at 18:36

answered Jul 21, 2015 at 18:25

Oleksandr T.

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Comments

Nikhil Aggarwal · Accepted Answer · 2015-07-21 18:25:11Z

0

update code to following

$("#backgroundImg").css("width", setWidth + "px");

answered Jul 21, 2015 at 18:25

Nikhil Aggarwal

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Comments

Bryan Mudge · Accepted Answer · 2015-07-21 18:28:16Z

0

One option: $("#backgroundImg").css("width","100%");

with your variable option do: var setWidth = $(window).width() +'px';

so your code would be

$(document).ready(function(){
$("#backgroundImg").css("width", setWidth);

});

answered Jul 21, 2015 at 18:28

Bryan Mudge

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1 Comment

Nikhil Aggarwal Over a year ago

The first option is incorrect. Second option is correct with a small error - just add "px" as well

spencer · Accepted Answer · 2015-07-21 18:33:54Z

0

This should make the background match the browser's current width:

$( "#backgroundImg" ).width( setWidth )

Source

answered Jul 21, 2015 at 18:33

spencer

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