378638a451
Summary: update website to use TS instead of JS Reviewed By: passy Differential Revision: D16986666 fbshipit-source-id: 969de3ffcdf4aa594d9811947e5b440e594838e7
73 lines
2.2 KiB
Markdown
73 lines
2.2 KiB
Markdown
---
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id: styling-components
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title: Styling Components
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---
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We are using [emotion](https://emotion.sh) to style our components. For more details on how this works, please refer to emotion's documentation. We heavily use their [Styled Components](https://emotion.sh/docs/styled) approach, which allows you to extend our built-in components.
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## Basic tags
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For basic building blocks (views, texts, ...) you can use the styled object.
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```javascript
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import {styled} from 'flipper';
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const MyView = styled('div')({
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fontSize: 10,
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color: colors.red
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});
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const MyText = styled('span')({ ... });
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const MyImage = styled('img')({ ... });
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const MyInput = styled('input')({ ... });
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```
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## Extending Flipper Components
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It's very common for components to require customizing Flipper's components in some way. For example changing colors, alignment, or wrapping behavior. Flippers components can be wrapped using the `styled` function which allows adding or overwriting existing style rules.
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```javascript
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import {FlexRow, styled} from 'flipper';
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const Container = styled(FlexRow)({
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alignItems: 'center',
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});
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class MyComponent extends Component {
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render() {
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return <Container>...</Container>;
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}
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}
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```
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## CSS
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The CSS-in-JS object passed to the styled components takes just any CSS rule, with the difference that it uses camel cased keys for the properties. Pixel-values can be numbers, any other values need to be strings.
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The style object can also be returned from a function for dynamic values. Props can be passed to the styled component using React.
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```javascript
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const MyView = styled('div')(
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props => ({
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fontSize: 10,
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color: => (props.disabled ? colors.red : colors.black),
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})
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);
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// usage
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<MyView disabled />
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```
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Pseudo-classes can be used like this:
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```javascript
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'&:hover': {color: colors.red}`
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```
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## Colors
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The colors module contains all standard colors used by Flipper. All the available colors are defined in [`src/ui/components/colors.tsx`](https://github.com/facebook/flipper/blob/master/src/ui/components/colors.tsx) with comments about suggested usage of them. And we strongly encourage to use them. They can be required like this:
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```javascript
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import {colors} from 'flipper'
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```
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