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Changes in event delegation
The React 17 update eases the nesting of applications that are built using different React versions. A lot of conflicts were seen when many versions of React are being used together. With this update, event handlers will not be attached at document levels. In its place, it will go to the root DOM container where your React tree is rendered. Also, with React 17 going in for gradual changes, developers will have more freedom when it comes to migration of apps in one go or smaller chunks.Native component stacks
Finding errors with javascript function; its name and location stack trace can lead to a needle in a haystack hunt while sifting through hundreds of coding lines (if not a thousand). To pinpoint errors in React 17, there is an unorthodox approach taken by the React team. Here is what they are thinking, in their own words:Currently, the browsers don’t provide a way to get a function’s stack frame (source file and location). So when React catches an error, it will now reconstruct its component stack by throwing (and catching) a temporary error from inside each of the components above, when it is possible.This improvement will come in handy during the production environment.
