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Merged
merged 2 commits into from
Jan 14, 2023
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Update tree-shaking.mdx #1760

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190aa63
Update tree-shaking.mdx
Lxdll Jan 12, 2023
a98dff2
Update src/content/guides/tree-shaking.mdx
jacob-lcs Jan 14, 2023
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2 changes: 1 addition & 1 deletion src/content/guides/tree-shaking.mdx
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Expand Up @@ -317,7 +317,7 @@ export { default as ButtonGroup } from './ButtonGroup';

## 将函数调用标记为无副作用 $#mark-a-function-call-as-side-effect-free$

是可以告诉 webpack 一个函数调用是无副作用的，只要通过 `/*#__PURE__*/` 注释。它可以被放到函数调用之前，用来标记它们是无副作用的(pure)。传到函数中的入参是无法被刚才的注释所标记，需要单独每一个标记才可以。如果一个没被使用的变量定义的初始值被认为是无副作用的（pure），它会被标记为死代码，不会被执行且会被压缩工具清除掉。这个行为被会开启当 [`optimization.innerGraph`](/configuration/optimization/#optimizationinnergraph) 被设置成 `true`。
是可以告诉 webpack 一个函数调用是无副作用的，只要通过 `/*#__PURE__*/` 注释。它可以被放到函数调用之前，用来标记它们是无副作用的(pure)。传到函数中的入参是无法被刚才的注释所标记，需要单独每一个标记才可以。如果一个没被使用的变量定义的初始值被认为是无副作用的（pure），它会被标记为死代码，不会被执行且会被压缩工具清除掉。当 [`optimization.innerGraph`](/configuration/optimization/#optimizationinnergraph) 被设置成 `true` 时这个行为会被启用。

**file.js**

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