iconfont图标全选

控制台直接粘贴、复制、回车就好了，方法来自：https://blog.csdn.net/qiangd/article/details/60130504

var span = document.querySelectorAll('.icon-cover');
for (var i = 0, len = span.length; i < len; i++) {
     console.log(span[i].querySelector('span').click());
}