//获取最左的前N个字,并返回是否带省略号
String.prototype.left = function(len, bdot) {
var str = this;
if (bdot == 'undefined') { bdot = false; }
if (str.length <= len) { return str; }
str = str.substr(0, len);
if (bdot) { str += "..."; }
return str;
}
$(function(){
var text = $('.txt').html();
$('.txt').text(text.left(2, true));
})
</script>
<div class="txt">s中华fsdfd人民共和图</div>
loading