JS控制textareat标签自应适

$(function(){
        $.fn.autoHeight = function(){    
        function autoHeight(elem){
            elem.style.height = 'auto';
            elem.scrollTop = 0; //防抖动
            elem.style.height = elem.scrollHeight + 'px';
        }
        this.each(function(){
            autoHeight(this);
            $(this).on('keyup', function(){
                autoHeight(this);
            });
        });     
    }                
        $('textarea[autoHeight]').autoHeight();    
    })

<textarea autoHeight="true" readonly="readonly" ></textarea>

Tags：textareat

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