jquery开关按钮效果

.circular1{
            width: 50px;
            height: 30px;
            border-radius: 16px;
            background-color: #ccc;
            transition: .3s;
            cursor: pointer;
 }
.round-button1{
            width: 30px;
            height: 30px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 1px 5px rgba(0,0,0,.5);
            transition: .3s;
            position: relative;
            left:;
}
.round-button1:hover{
            transform: scale(1.2);
            box-shadow: 0 1px 8px rgba(0,0,0,.5);
}

<div class="circular1">
    <div class="round-button1"></div>
</div>

$(function () {
        $('.circular1').click(function () {
            var left = $('.round-button1').css('left');
            left = parseInt(left);
            if (left == 0) {
                $('.round-button1').css({'left': '22px', 'background-color': '#F00'});
                $(this).css({'background-color': '#e7e7e7', 'box-shadow': '0 0 5px #999 inset'})
            } else {
                $('.round-button1').css({'left': '0', 'background-color': '#fff'})

            }
        })
    })