25 lines
1,020 B
Markdown
25 lines
1,020 B
Markdown
---
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tags:
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- javascript
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- react
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---
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# Controlled components
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Controlled components relate to how you use forms in React.
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You can use standard form HTML within a React component but applying React state
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to the form via controlled components gives you greater power over what you do
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with the inputs and how you handle the data that is received.
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Standard HTML forms have a separate state from the rest of the document object
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and this is highly mutable. It can send requests to a server and reload the
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page. This mutability can obviously interfere with the state you maintain in
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your React components; this is why it is best to manage form state along with
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React state.
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We can combine the two [native HTML form state and React state] by making the
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React state be the “single source of truth”. Then the React component that
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renders a form also controls what happens in that form on subsequent user input.
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An input form element whose value is controlled by React in this way is called a
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“controlled component”.
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