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update-unknown-warning-page - add a reason for the warning (#8131) 

* update-unknown-warning-page - add a reason for this warning

* Minor tweaks
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Damien Soulard 8 years ago
committed by Dan Abramov
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      warnings/unknown-prop.md

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warnings/unknown-prop.md
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@ -13,6 +13,8 @@ There are a couple of likely reasons this warning could be appearing:
3. React does not yet recognize the attribute you specified. This will likely be fixed in a future version of React. However, React currently strips all unknown attributes, so specifying them in your React app will not cause them to be rendered. 3. React does not yet recognize the attribute you specified. This will likely be fixed in a future version of React. However, React currently strips all unknown attributes, so specifying them in your React app will not cause them to be rendered.
4. You are using a React component without an upper case. React interprets it as a DOM tag because [React JSX transform uses the upper vs. lower case convention to distinguish between user-defined components and DOM tags](/react/docs/jsx-in-depth.html#user-defined-components-must-be-capitalized).
--- ---
To fix this, composite components should "consume" any prop that is intended for the composite component and not intended for the child component. Example: To fix this, composite components should "consume" any prop that is intended for the composite component and not intended for the child component. Example:

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