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A comment on React v16.3.0: New lifecycles and context API. Parent comment
The biggest one is probably adding event listeners or setting up subscriptions (which can cause memory leaks).
Here are some others: https://github.com/reactjs/rfcs/blob/master/text/0006-static...
> Is it correct to say that `getSnapshotBeforeUpdate` is named to indicate what you were supposed to use `componentWillMount` for?
No. `getSnapshotBeforeUpdate` is not really related to `componentWillMount`. It relates more to what people were using `componentWillUpdate` for.
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The biggest one is probably adding event listeners or setting up subscriptions (which can cause memory leaks).
Here are some others: https://github.com/reactjs/rfcs/blob/master/text/0006-static...
> Is it correct to say that `getSnapshotBeforeUpdate` is named to indicate what you were supposed to use `componentWillMount` for?
No. `getSnapshotBeforeUpdate` is not really related to `componentWillMount`. It relates more to what people were using `componentWillUpdate` for.