https://segmentfault.com/a/1190000016760627
<<< docs/.vuepress/components/js/2018_10_29_01/2018_10_29_01.js
<<< docs/.vuepress/components/js/2018_10_29_02/html_scroll_mobil.vue
<<< docs/.vuepress/components/js/2018_10_29_02/html_scroll_pc.vue
children
注意:在 IE 中,children 包含注释节点。
<div id="wrapper">
<div>在Javascript中,可以通过 children 来获取所有子节点。</div>
<div>在Javascript中,可以通过 children 来获取所有子节点。</div>
<div>在Javascript中,可以通过 children 来获取所有子节点。</div>
<div>在Javascript中,可以通过 children 来获取所有子节点。</div>
</div>
let wrapper = document.getElementById('wrapper').children;