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react-native-css-media-query-processor
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Readme
Match style objects containing CSS Media Queries with React Native
This library is based on React Native Extended StyleSheet's CSS Media Queries implementation.
npm install react-native-css-media-query-processor --save-dev
or
yarn add react-native-css-media-query-processor --dev
This library takes parsed CSS with media queries and matches it during runtime with React Native's current device dimensions and device orientation.
To minimize runtime performance hit, the media queries must be parsed already before calling process
function. Have a look at the example to see how the parsed syntax looks like.
You can use this library together with css-to-react-native-transform to transform a string of CSS containing media queries to an React Native style object.
Notice that there is no syntax validation for CSS media queries. This is done to ensure that the media query matching is as fast as possible. If you want to validate syntax for the media queries, you should do that when they are parsed to style objects (that's what css-to-react-native-transform does).
Given that React Native returns the following dimensions:
import { Dimensions } from "react-native";
Dimensions.get("window");
// => { width: 110, height: 100 }
This is a simplified example of how the CSS gets transformed in to a React Native compatible style object:
App.css
:
.foo {
color: red;
margin-top: 1px;
}
.bar {
font-size: 1rem;
}
@media (min-width: 50px) and (max-width: 150px) {
.foo {
color: blue;
}
.bar {
font-size: 2rem;
}
}
↓ ↓ ↓ ↓ ↓ ↓
import styles from "./App.css";
import transform from "css-to-react-native-transform";
transform(styles, { parseMediaQueries: true });
↓ ↓ ↓ ↓ ↓ ↓
const styleObject = {
__mediaQueries: {
"@media (min-width: 50px) and (max-width: 150px)": [
{
inverse: false,
type: "all",
expressions: [
{ modifier: "min", feature: "width", value: "50px" },
{ modifier: "max", feature: "width", value: "150px" }
]
}
]
},
foo: {
color: "red",
marginTop: 1
},
bar: {
fontSize: 16
},
"@media (min-width: 50px) and (max-width: 150px)": {
foo: {
color: "blue"
},
bar: {
fontSize: 32
}
}
};
↓ ↓ ↓ ↓ ↓ ↓
import { process } from "react-native-css-media-query-processor";
import { Dimensions } from "react-native";
const win = Dimensions.get("window");
const matchObject = {
width: win.width,
height: win.height,
orientation: win.width > win.height ? "landscape" : "portrait",
"aspect-ratio": win.width / win.height,
type: "screen"
};
process(styleObject, matchObject);
↓ ↓ ↓ ↓ ↓ ↓
{
foo: {
color: "blue",
marginTop: 1
},
bar: {
fontSize: 32
}
}
FAQs
Match style objects containing CSS Media Queries with React Native
The npm package react-native-css-media-query-processor receives a total of 851 weekly downloads. As such, react-native-css-media-query-processor popularity was classified as not popular.
We found that react-native-css-media-query-processor demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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