textarea高度自适应解决方法

引入autosize.js

<script src="./autosize.js"></script>

autosize(document.getElementsByTagName('textarea'));
var textareas = document.getElementsByTagName('textarea');
for (var i =0;i<textareas.length;i++){
  textareas[i].style.minHeight="60px";
}

下载地址

https://www.bootcdn.cn/autosize.js/