Multiple Queries

README.md

@@ -36,7 +36,9 @@ You can find the library on `window.ReactMedia`.
 
 ## Usage
 
-Render a `<Media>` component with a `query` prop whose value is a valid [CSS media query](https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries). The `children` prop should be a function whose only argument will be a boolean flag that indicates whether the media query matches or not.
+Render a `<Media>` component with a `query` prop whose value is a valid [CSS media query](https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries) or a `queries` prop whose value is an object with keys as the name of your query and values as a vali [CSS media queries](https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries). The `children` prop should be a function whose only argument will be a boolean flag that indicates whether the media query matches or not.
+
+with `query`:
 
 ```js
 import React from 'react'
@@ -59,6 +61,41 @@ class App extends React.Component {
 }
 ```
 
+with `queries`:
+
+```js
+import React from 'react'
+import Media from 'react-media'
+
+class App extends React.Component {
+  render() {
+    return (
+      <div>
+        <Media
+          queries={{
+            small: "(min-width: 300px)"
+            medium: "(min-width: 600px)"
+          }}
+        >
+          {({ small, medium }) => (
+            <div>
+              <p>This always shows.</p>
+              small && (
+                <p>The document is at least 300px wide.</p>
+              )
+              medium && (
+                <p>The document is at least 600px wide.</p>
+              )
+            </div>
+          )}
+        </Media>
+      </div>
+    )
+  }
+}
+```
+
+
 If you render a `<Media>` component on the server, it always matches.
 
 If you use a regular React element as `children` (i.e. `<Media><SomethingHere/></Media>`) it will be rendered if the query matches. However, *you may end up creating a bunch of elements that won't ever actually be rendered to the page* (i.e. you'll do a lot of unnecessary `createElement`s on each `render`). Thus, a `children` **function** (i.e. `<Media>{matches => ...}</Media>`) is the preferred API. Then you can decide in the callback which elements to create based on the result of the query.
@@ -84,7 +121,7 @@ class App extends React.Component {
 
 The `render` prop is never called if the query does not match.
 
-`<Media query>` also accepts an object, similar to [React's built-in support for inline style objects](https://facebook.github.io/react/tips/inline-styles.html) in e.g. `<div style>`. These objects are converted to CSS media queries via [json2mq](https://github.com/akiran/json2mq/blob/master/README.md#usage).
+`<Media query>` and `<Media queries>` also accepts an object, similar to [React's built-in support for inline style objects](https://facebook.github.io/react/tips/inline-styles.html) in e.g. `<div style>`. These objects are converted to CSS media queries via [json2mq](https://github.com/akiran/json2mq/blob/master/README.md#usage).
 
 ```js
 import React from 'react'

modules/Media.js

@@ -10,7 +10,14 @@ class Media extends React.Component {
       PropTypes.string,
       PropTypes.object,
       PropTypes.arrayOf(PropTypes.object.isRequired)
-    ]).isRequired,
+    ]),
+    queries: PropTypes.shape({
+      [PropTypes.string]: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.object,
+        PropTypes.arrayOf(PropTypes.object.isRequired)
+      ]),
+    }),
     render: PropTypes.func,
     children: PropTypes.oneOfType([
       PropTypes.node,
@@ -22,37 +29,75 @@ class Media extends React.Component {
     matches: true
   }
 
-  updateMatches = () =>
-    this.setState({ matches: this.mediaQueryList.matches })
+  updateMatches = () => {
+    let { query, queries } = this.props
+    if (query)
+      this.setState({
+        matches: this.mediaQueryList.reduce((accumulated, { name, mm }) => ({
+          ...accumulated,
+          [name]: mm.matches,
+        }), {}).match,
+      })
+
+    if (queries)
+      this.setState({
+        matches: this.mediaQueryList.reduce((accumulated, { name, mm }) => ({
+          ...accumulated,
+          [name]: mm.matches,
+        }), {}),
+      })
+  }
 
   componentWillMount() {
     if (typeof window !== 'object')
       return
 
-    let { query } = this.props
+    let { query, queries } = this.props
 
-    if (typeof query !== 'string')
+    if (query && typeof query !== 'string')
       query = json2mq(query)
 
-    this.mediaQueryList = window.matchMedia(query)
-    this.mediaQueryList.addListener(this.updateMatches)
+    if (query) {
+      this.mediaQueryList = [
+        {
+          name: 'match',
+          mm: window.matchMedia(query),
+        }
+      ]
+    }
+
+    if (queries) {
+      queries = Object.keys(queries).map(mq => ({
+        name: mq, 
+        qs: json2mq(queries[mq]),
+      }))
+      this.mediaQueryList = queries.map(mq => ({
+        name: mq.name,
+        mm: window.matchMedia(mq.qs),
+      }))
+    }
+
+    this.mediaQueryList.map(ql => ql.mm.addListener(this.updateMatches))
     this.updateMatches()
   }
 
   componentWillUnmount() {
-    this.mediaQueryList.removeListener(this.updateMatches)
+    let { query, queries } = this.props
+    if (query || queries)
+      this.mediaQueryList.map(ql => ql.mm.removeListener(this.updateMatches))
   }
 
   render() {
-    const { children, render } = this.props
+    const { children, render, queries, query } = this.props
     const { matches } = this.state
 
     return (
       render ? (
         matches ? render() : null
       ) : children ? (
         typeof children === 'function' ? (
-          children(matches)
+          query && children(matches) ||
+          queries && children({ ...matches })
         ) : !Array.isArray(children) || children.length ? ( // Preact defaults to empty children array
           matches ? React.Children.only(children) : null
         ) : (

modules/__tests__/Media-test.js

@@ -72,6 +72,51 @@ describe('A <Media>', () => {
       })
     })
 
+    describe('and a queries object', () => {
+      it('renders its child', () => {
+        const queries = { 
+          sm: {
+            maxWidth: window.innerWidth,
+          },
+        }
+        const element = (
+          <Media queries={queries} render={() => (
+            <div>hello</div>
+          )}/>
+        )
+
+        render(element, node, () => {
+          expect(node.firstChild.innerHTML).toMatch(/hello/)
+        })
+      })
+
+      it('passes matches for each key', () => {
+        const queries = { 
+          sm: {
+            maxWidth: window.innerWidth,
+          },
+          md: {
+            maxWidth: window.innerWidth - 1,
+          },
+        }
+        const element = (
+          <Media queries={queries}>
+            {({ sm, md }) => (
+              <div>
+                {md && 'goodbye'}
+                {sm && 'hello'}
+              </div>
+            )}
+          </Media>
+        )
+
+        render(element, node, () => {
+          expect(node.firstChild.innerHTML).toMatch(/hello/)
+        })
+      })
+    })
+
+
   })
 
   describe('with a query that does not match', () => {