div内容过长自动省略号

<div class="tits" style="width:900px;">${item.note}</div>

  

    //自动计算长度，并剔除html元素

    $(".tits").each(function(i) {

        var leg = 280;

        $(this).html($(this).text());

            var copyThis = $(this.cloneNode(true)).hide().css({

                'position': 'absolute',

                'width': 'auto',

                'overflow': 'visible'

            });

            $(this).after(copyThis);

            if(copyThis.width()>$(this).width()){

                $(this).html($(this).text().substring(0,leg)+'...');

                copyThis.remove();

            }else{

                copyThis.remove(); //清除复制

                return;

            }

    });