使用jQuery基于屏幕大小添加div类

Question

I have a div class="container that I would like to add to <div class="second-menu-it"> if the screen size is less than 959px:

Below is the code i am trying to use:

$(window).on('resize', function() {
if($(window).width() < 959) {
    $('.second-menu-it').addClass('container');


})

Answer 1

You forgot the } after the addClass

$(window).on('resize', function() {
    if($(window).width() < 959) {
        $('.second-menu-it').addClass('container');
    }
});