jQuery更改背景大小

Question

I have problem with changing background-size via jQuery. It works when you give only one parameter, but when I give 2 parameter it doesn't work, I need to send via jQuery 2 variables into background-size for width and height.

here is my js code example.

var w = 100;
var h = 100;

$("div").css("background-size", w+"px" + h + "px");

here is demo

http://jsfiddle.net/Lv4wt75f/

it's just a simple example in real version I need to send 2 parameter that calculate ratio.

Thanks

Answer 1

Because both those parameters need to have a space in between. You simply need one extra space

$("div").css("background-size", w+"px " + h + "px");
                                     ^

Fiddle

Syntax Reference

Answer 2

您需要在该px之间留一个空格。

Answer 3

$("div").css("background-size", w+"px " + h + "px");
                                     ^ (Space Here)

Answer 4

$("div").css("background-size": w+"px " + h+"px");
                                     ^ (Space)

use :(colon) instead of ,(comma) after background-size