阅读字体大小设置功能

html结构：

<div class="fontSet">
    <i class="aa"></i>
    <div class="text_img"><div class="button"><span>中</span></div></div>
    <i class="aaa"></i>
</div>

js代码：

//设置字体大小
function fize() {
    let left = parseInt($('.button').css('left'))
    console.log(left);
    //字体减
    $('.aa').click(function () {
        let left = parseInt($('.button').css('left'))
         if (left>0){
             console.log(left,"减");
             $('.button').css('left',left-83+"px")

             if (left == 249){
                 $('.text-content p').css({'font-size':'18px','line-height':'27px'});
                 $('.text-content a').css('font-size','16px');
                 $('.button span').html('大')
             }

             if (left == 166){
                 $('.text-content p').css({'font-size':'16px','line-height':'25px'});
                 $('.text-content a').css('font-size','14px');
                 $('.button span').html('中')
             }
             if (left == 83){
                 $('.text-content p').css({'font-size':'14px','line-height':'23px'});
                 $('.text-content a').css('font-size','12px');
                 $('.button span').html('小')
             }
         }
    });
    //字体加
    $('.aaa').click(function () {
        let left = parseInt($('.button').css('left'))
        if (left<249){
            console.log(left,"加");
            $('.button').css('left',left+83+"px")

            if (left == 0){
                $('.text-content p').css({'font-size':'16px','line-height':'25px'});
                $('.text-content a').css('font-size','14px');
               $('.button span').html('中')

            }

            if (left == 83){
                $('.text-content p').css({'font-size':'18px','line-height':'27px'});
                $('.text-content a').css('font-size','16px');
                $('.button span').html('大')
            }
            if (left == 166){
                $('.text-content p').css({'font-size':'20px','line-height':'29px'});
                $('.text-content a').css('font-size','18px');
                $('.button span').html('特')
            }
        }
    })
}
fize()