Not long ago, React announced the release of version 1 with long-standing feature requests including , fragments, improved server-side rendering, and more. boundaries are especially useful so that an in one small of the UI doesn’t break your entire application. Instead, it’s better to contain those errors to the affected components and recover gracefully.

You can try using error boundaries yourself in our working Codepen example. We forked it from 217;s initial version to show how to add Rollbar217;s JavaScript error logging. When you open this page, you can activate an error boundary by clicking at least five times on the counter. You will then see the error message “Something went wrong.” Let’s dive deeper into this example to learn how error boundaries work.

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