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Discussion on: React Context API Made Simple – The practical guide (Updated)

wkrueger profile image
Willian Krueger

I'd say selective rendering with contexts is painful bc a context will always rerender all of its consumers if the reference of the value passed to Provider changes (=== comparison).

So, for instance, passing an object built on every render will certainly trigger a mass re-render.

To fix this one has to break the data into multiple context providers.

If you inspect a redux application (with react dev tools) you may notice DOZENS of context consumers generated by the library wrapping an element.

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jamesthomson profile image
James Thomson

I'd say selective rendering with contexts is painful bc a context will always rerender all of its consumers if the reference of the value passed to Provider changes (=== comparison).

Exactly right. It's the side effects of something updating in a context and that waterfall effect that makes them so painful.