Question

I’m not able to change font size using Jquery. I want to change font size of a div. I have defined default font size for body as 12. I tried to change it as follows, but it didn’t work 🙁

$("#SelFontSize").change(function(){
$("#"+styleTarget).css({'font-size':'"+$(this).val()+"px'});    
});

Answer 1

Try:

$("#"+styleTarget).css({ 'font-size': $(this).val() });

By putting the value in quotes, it becomes a string, and "+$(this).val()+"px is definitely not close to a font value. There are a couple of ways of setting the style properties of an element:

Using a map:

$("#elem").css({
    fontSize: 20
});

Using key and value parameters:

All of these are valid.

$("#elem").css("fontSize", 20);
$("#elem").css("fontSize", "20px");
$("#elem").css("font-size", "20");
$("#elem").css("font-size", "20px");

You can replace "fontSize" with "font-size" but it will have to be quoted then.