How to use the isUndefined function from util

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util.md?plain=1

GitHub: Amery2010/nodejs-api-doc-cn

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  // true
```


<div id="isUndefined" class="anchor"></div>
## util.isUndefined(object)

> 稳定度：0 - 已废弃

如果给定的 'object' 是 `undefined`，返回 `true`。否则，返回 `false`。

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+ 3 other calls in file

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