HTML

Repaints

• 修改可见性样式触发 - 例如 opacity, background-color, visibility, outline

Reflow

• 修改布局时触发 - 修改样式不触发 - 影响很大，阻塞计算
• 计算位置和尺寸 - 影响上下级和同一级
• position: absolute; position: fixed; 可减少 reflow 影响
• display: none; 不影响
• 参考
  • What forces layout / reflow
  • Recommended way of making React component/div draggable

navigator.permissions

• navigator.permissions

geolocation

• Using geolocation
• test.wener.me/geo.html

video

<!-- 单 source -->
<video src="/media/flower.mp4" controls width="250"></video>

<!-- 多 source -->
<video controls width="250">
  <source type="video/webm" src="/media/flower.webm" />
  <source type="video/mp4" src="/media/flower.mp4" />
  <!-- 字幕 -->
  <track label="English" kind="subtitles" srclang="en" src="captions/vtt/sintel-en.vtt" default />

  Sorry, your browser doesn't support embedded videos.
</video>

• video

audio

• controlslist
  • nodownload, nofullscreen, noremoteplayback
  • noplaybackrate

Semantic Tags

• header
• nav
• section
• article
• p
• blockquote
• cite
• code
• aside
• footer
• figure
• figcaption
• mark
• time
• address
• abbr
• dl
• dt
• dfn
• output
• q - quote - 会添加前后引号，cite 熟悉指定来源

Functional tags

• dialog
  • $dialog.showModal
  • <form method="dialog"> 在 submit 时会关闭 dialog
  • close 事件包含 returnValue - 是 button 的 value
  • ::backdrop 可用于设置 backdrop 层的样式
• button
• details
  • summary

Table

• table
  • caption
  • colgroup - 列分组
    • col - .span
  • thead
    • tr
      • th
        • .scope - row,col,rowgroup,colgroup
        • .abbr
        • .colspan
        • .rowspan
        • .headers
  • tbody
    • tr
      • td
        • .colspan
        • .rowspan
        • .headers - 空格分隔，th 的 id
  • tr
    • td
    • th
  • tfoot
    • tr
      • th
      • td

• www.w3schools.com/tags/default.asp