复制代码 代码如下:

<div class=\"form-group\">
    <label class=\"col-sm-3 control-label no-padding-right\" for=\"form-field-5\"> 内容</label>
    <div class=\"col-sm-9\">
        <textarea class=\"col-sm-8\" id=\"form-field-5\" placeholder=\"请输入内容...\"></textarea>
    </div>
</div>

复制代码 代码如下:

jQuery.extend({
    textareaAutosize_dc: function() {
        $(\"textarea\").on(\"keyup\", function(e) {
            var currentEnterCount = $(this).val().split(\"\\n\").length;
            var lineHeight = Number($(this).css(\"line-height\").replace(\"px\", \"\"));
            var enterCount = $(this).attr(\"enterCount\");
            if (currentEnterCount < enterCount && enterCount != undefined) {
                //每行减掉固定行高
                $(this).height($(this).height() - lineHeight);
            } else if (currentEnterCount > enterCount) {
                //每行加入固定行高
                $(this).height($(this).height() + lineHeight);
                $(this).attr(\"enterCount\", currentEnterCount);
            }
            //记录当前行高
            $(this).attr(\"enterCount\", currentEnterCount);
        });
    }
});
//调用自动高度
$.textareaAutosize_dc();