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Update CreatingReagentComponents.md

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Justin Lee 2018-07-20 15:32:51 -07:00 committed by GitHub
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doc/CreatingReagentComponents.md
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@ -188,7 +188,7 @@ Note the `old-argv` above in the signature for `component-did-mount`. Many of t
Alternately, you can use `(reagent/props this)` and `(reagent/props children)`, but, conceptually, these don't map as clearly to the `argv` concept. Specifically, the arguments to your render function are actually passed as children (not props) to the underlying React component, **unless the first argument is a map.** If the first argument is a map, then that map is passed as props, and the rest of the arguments are passed as children. Using `props` and `children` may read a bit cleaner, but you do need to pay attention to whether you're passing a props map or not. Alternately, you can use `(reagent/props this)` and `(reagent/props children)`, but, conceptually, these don't map as clearly to the `argv` concept. Specifically, the arguments to your render function are actually passed as children (not props) to the underlying React component, **unless the first argument is a map.** If the first argument is a map, then that map is passed as props, and the rest of the arguments are passed as children. Using `props` and `children` may read a bit cleaner, but you do need to pay attention to whether you're passing a props map or not.
Finally, note that some react lifecycle methods take `prevState` and `nextState`. Because state management provides its own state management system, there is no access to these parameters in the lifecycle methods. Finally, note that some react lifecycle methods take `prevState` and `nextState`. Because Reagent provides its own state management system, there is no access to these parameters in the lifecycle methods.
It is possible to create `Form-3` `components` using `with-meta`. However, `with-meta` is a bit clumsy and has no advantages over the above method, but be aware that an alternative way exists to achieve the same outcome. It is possible to create `Form-3` `components` using `with-meta`. However, `with-meta` is a bit clumsy and has no advantages over the above method, but be aware that an alternative way exists to achieve the same outcome.