react-hooks-introduction | React Hooks for function components | Frontend Utils library
kandi X-RAY | react-hooks-introduction Summary
kandi X-RAY | react-hooks-introduction Summary
Introduction to React Hooks for function components (released in React 16.7.)
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Top functions reviewed by kandi - BETA
- Initialize the application .
- Registers a new SWF service and registers it in the browser
- register web worker
- Checks if a service worker is reloaded
- set - offline
- Unregister the service
- Removes a specific item from the list
- on is offline
- on is - synchronously .
react-hooks-introduction Key Features
react-hooks-introduction Examples and Code Snippets
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Trending Discussions on react-hooks-introduction
QUESTION
I was learning about react hooks and I was going through the example by in the academind,
There the author has mentioned something like this
When you set a new state with React Hooks (i.e. via setCart in our example), the old state will always be replaced!
With probably following example:
...ANSWER
Answered 2019-Nov-03 at 07:46When you call setState(), React merges the object you provide into the current state.
With useState updating a state variable always replaces it instead of merging it.
I will try to explain with a sample:
QUESTION
I'm using the excellent work of Robin Wieruch to understand how to make a call to an API Endpoint. Here's one of his projects: https://github.com/the-road-to-learn-react/react-hooks-introduction
Shown below is a modified version of his useDataApiHook-example
. With it I wired up two buttons, which then give me 3 ways to query an endpoint. I've chosen to use the same endpoint in all cases but have tested it with different endpoints and it seems to work fine.
ANSWER
Answered 2019-Sep-04 at 10:57Suppose I don't want to call the query upon component load (and don't want a GET request going out upon load). How would one do that?
You may pass an empty string to your hook and create a condition that fetch isn't triggered when API endpoint is empty:
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Install react-hooks-introduction
cd react-hooks-introduction
npm install
npm start
visit http://localhost:3000
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