溢出文本省略号的js实现

/**
 * @param element
 */
function ellipsis(element) {
        var limitWidth = element.clientWidth;
        var temp = element.cloneNode(true);
        temp.style.float = 'left';
        temp.style.width = 'auto';
        element.parentNode.appendChild(temp);

        var realWidth = temp.clientWidth;
        if(realWidth >= limitWidth){
            var ellipsisText = '...';
            var str = element.innerHTML;
            str.replace(/s+/g, ' ');
            temp.innerHTML = ellipsisText;
            var s, totalWidth = 0, newHtml = '', oldHtml;
            for (var i = 0, len = str.length; i < len; i++) {
                s = str.substr(0, i);
                oldHtml = temp.innerHTML;
                newHtml = s + ellipsisText;
                temp.innerHTML = newHtml;
                totalWidth = temp.clientWidth;

                if (totalWidth > limitWidth) {
                    newHtml = oldHtml;
                    break;
                }
            }
            element.innerHTML = newHtml;
        }
        temp.parentNode.removeChild(temp);
    }

注意

元素需添加css属性：white-space: nowrap;overflow: hidden;