如果屏幕宽度小于960像素，则将屏幕宽度添加到类中

Question

The code below adds width of screen to class .reverse

var w = $(window).width();
 $('.reverse').css('width', w);

but I want it to do so only if the screen width is less than 960px:

if ($(window).width() < 960) {
    $('.reverse').css('width', w);
}

The code above is not working, could you take a look? Thx!

Answer 1

I think you are resizing window to check this effect so you need to add resize eventListener,to the DOM.

 $(window).on('resize',function(){
     var w=$(window).width();
    if (w< 960) {
        $('.reverse').css('width', w);
    }
    })

Answer 2

Try with jQuery

$(window).resize(function(){
  var width = $(window).width();
  console.log(width);
  if (width < 960){
    $('.reverse').css('width', width);
  };
});

This way you're constantly checking the window's width while resizing as well.

Answer 3

You can also do this with CSS and a media query if you don't have to use javascript

@media (max-width: 960px) {
  .reverse {
    width: 100vw;
  }
}

Answer 4

var w = $(window).width();
if (w < 960) {
    $('.reverse').css('width', w);
}

Note, add the event management if needed but no w was defined.

IF you add the event management in, be careful as it will fire a lot and it would be best to NOT force a re-flow every time - look into that separate issue.

A link to a possible debounce for the resize https://www.paulirish.com/2009/throttled-smartresize-jquery-event-handler/

Answer 5

  if ($(window).width() < 960) { $('.reverse').css('width', w); } 

You didn't initialize w