$(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();
})
页面中的textarea直接加属性就行
<textarea autoHeight="true" readonly="readonly" > </textarea>
pc 移动端都经过测试,没问题 放心用吧!