Can I change the media query using javascript / jQuery?

Question

I have a style.css with a media query. In my javascript-file, I have a value for the desired mobile-width stored in a variable.

By changing the variable, I want to c

Answer 1

You can write by using $(window).width()

value=959;

if($(window).width() < value)
{
    $(".classname").css("color","white");
}