will-change

will-change

用于优化预计将要变化的元素的即将到来的动画的工具类。

Class Styles

Class	Styles
`will-change-auto`	`will-change: auto;`
`will-change-scroll`	`will-change: scroll-position;`
`will-change-contents`	`will-change: contents;`
`will-change-transform`	`will-change: transform;`
`will-change-<custom-property>`	`will-change: var(<custom-property>);`
`will-change-[<value>]`	`will-change: <value>;`

will-change-auto

will-change: auto;

will-change-scroll

will-change: scroll-position;

will-change-contents

will-change: contents;

will-change-transform

will-change: transform;

will-change-<custom-property>

will-change: var(<custom-property>);

will-change-[<value>]

will-change: <value>;

示例

使用 will-change-scroll、will-change-contents 和 will-change-transform 工具类来优化一个预计将在不久的将来发生变化的元素，通过指示浏览器在动画实际开始之前准备必要的动画：

<div class="overflow-auto will-change-scroll">
  <!-- ... -->
</div>

建议在元素变化之前立即应用这些工具类，然后在动画完成后不久使用 will-change-auto 将其移除。

will-change 属性旨在作为处理已知性能问题的最后手段来使用。避免过多使用这些工具类，或仅仅因为预期的性能问题而使用它们，因为这实际上可能导致页面性能降低。

Use the will-change-[<value>] syntax to set the will-change 属性 based on a completely custom value:

<div class="will-change-[top,left] ...">
  <!-- ... -->
</div>

For CSS variables, you can also use the will-change-(<custom-property>) syntax:

<div class="will-change-(--my-properties) ...">
  <!-- ... -->
</div>

This is just a shorthand for will-change-[var(<custom-property>)] that adds the var() function for you automatically.