iframe高度自适应

<iframe src="index.html"  onload="this.height=this.contentWindow.document.body.scrollHeight || this.contentWindow.document.body.scrollHeight" id="external-frame"></iframe>

 

参考地址：https://www.cnblogs.com/imwtr/p/6050937.html

                  http://caibaojian.com/iframe-adjust-content-height.html