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85 lines
2.6 KiB
Markdown
85 lines
2.6 KiB
Markdown
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React-Input-Autosize
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====================
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A text input for [React](http://facebook.github.io/react/index.html) that resizes itself to the current content.
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## Demo & Examples
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Live demo: [jedwatson.github.io/react-input-autosize](http://jedwatson.github.io/react-input-autosize/)
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To run the examples locally, run:
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```
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npm install
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npm start
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```
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Then open [localhost:8000](http://localhost:8000) in a browser.
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## Installation
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The easiest way to use React-Input-Autosize is to install it from NPM and include it in your own React build process (using Browserify, rollup, webpack, etc).
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You can also use the umd build by including `dist/AutosizeInput.js` in your page. If you use this, make sure you have already included a umd React build.
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```
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npm install react-input-autosize --save
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```
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## Usage
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React-Input-Autosize generates an input field, wrapped in a `<div>` tag so it can detect the size of its value. Otherwise it behaves very similarly to a standard React input.
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```es6
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import AutosizeInput from 'react-input-autosize';
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<AutosizeInput
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name="form-field-name"
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value={inputValue}
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onChange={function(event) {
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// event.target.value contains the new value
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}}
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/>
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```
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## Gotchas
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### Changing the styles at runtime
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The styles applied to the input are only copied when the component mounts. Because of this, subsequent changes to the stylesheet may cause size to be detected incorrectly.
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To work around this, either re-mount the input (e.g. by providing a different `key` prop) or call the `copyInputStyles()` method after the styles change.
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### CSP and the IE "clear" indicator
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The input will automatically inject a stylesheet that hides IE/Edge's "clear" indicator, which otherwise breaks the UI. This has the downside of being incompatible with some CSP policies.
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To work around this, you can pass the `injectStyles={false}` prop, but if you do this I *strongly* recommend targeting the `input` element in your own stylesheet with the following rule:
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```css
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input::-ms-clear {display: none;}
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```
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### Custom font sizes
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If your input uses custom font sizes, you will need to provide the custom size to `AutosizeInput`.
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```es6
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<AutosizeInput
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name="form-field-name"
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value={inputValue}
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inputStyle={{ fontSize: 36 }}
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onChange={function(event) {
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// event.target.value contains the new value
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}}
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/>
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```
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### Uncontrolled input
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`AutosizeInput` is a [controlled input](https://facebook.github.io/react/docs/forms.html#controlled-components) and depends on the `value` prop to work as intended. It does not support being used as an uncontrolled input.
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## License
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Copyright (c) 2018 Jed Watson. [MIT](LICENSE) License.
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