# ignoreElements

**忽略掉所有的元素，只发出 `error` 或 `completed` 事件**

![](https://4217506537-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MWj545abP2yK86-qksJ%2Fsync%2F9b54c2b5d630daa68114b148b6c939aab637e001.png?generation=1616819397329821\&alt=media)

**ignoreElements** 操作符将阻止 `Observable` 发出 `next` 事件，但是允许他发出 `error` 或 `completed` 事件。

如果你并不关心 `Observable` 的任何元素，你只想知道 `Observable` 在什么时候终止，那就可以使用 **ignoreElements** 操作符。


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