Create and update an html5 webaudio "audio graph" using React. Each component in the React component tree represents an AudioNode. Audio is propagated up the tree branches until it reaches the render root, where the sound data is fed into an AudioDestinationNode and then played to audio output.
Create and update an html5 webaudio "audio graph" using React.
Each component in the React component tree represents an AudioNode. Audio is propagated up the tree branches until it reaches the render root, where the sound data is fed into an AudioDestinationNode and then played to audio output.
React-WebAudio uses React 0.14.
To use it as an npm package just install it
npm install react-webaudio
You will need to do something like
var ReactWebAudio = require('react-webaudio')
and then you can create and render audio graphs.
Checkout from git and run
npm run build
This will package up the react-webaudio components along with React and put the result in build/react-webaudio.js. If you include this into your webpage via a script tag:
<script src="react-webaudio.js"></script>
Then React
will appear in the global namespace and the new React Web Audio components are available as ReactWebAudio
.
Build a simple tone source which feeds into its parent AudioContext. Once audio gets to the AudioContext node it is rendered to the speakers.
ReactWebAudio.render(
React.createElement(ReactWebAudio.AudioContext,
{},
React.createElement(ReactWebAudio.OscillatorNode,
{frequency:this.props.beepfreq, playing:this.props.playbeep})),
mountelement
);
Each node feeds audio into the parent node, so a stupidly long filter chain looks like this:
React.createElement(ReactWebAudio.DynamicsCompressorNode,
{threshold:-50, knee:40, ratio:12, reduction:-20, attack:0.1, release:0.1},
React.createElement(ReactWebAudio.BiquadFilterNode,
{frequency: this.props.filterFrequency, type: this.props.filterType},
React.createElement(ReactWebAudio.GainNode,
{gain: this.props.gain},
React.createElement(ReactWebAudio.ConvolverNode,
{bufferAsArray: this.props.reverbImpulseResponse},
React.createElement(ReactWebAudio.DelayNode,
{delayTime: this.props.delayTime},
React.createElement(ReactWebAudio.WaveShaperNode,
{curve: this.props.distortionCurve},
React.createElement(ReactWebAudio.MediaElementAudioSourceNode,
{audioSourceElement: this.props.audioElement}
)
)
)
)
)
)
)
In this case you might want to take advantage of something like lodash's flowRight to compose functions.
For a more complete picture examine the examples/ directory. To try out the examples you can run
npm run dev
and browse to localhost:8080/
Not all nodes are supported yet. Some are hard to test, while others don't fit into the React data flow process very well. Still others are still being defined or redefined in the Web Audio spec. In particular:
Author: Izzimach
Source Code: https://github.com/Izzimach/react-webaudio
Article covers: How native is react native?, React Native vs (Ionic, Cordova), Similarities and difference between React Native and Native App Development.
Increase Performance of React Applications Via Array JavaScript Methods. We will create a simple event management application in the react to add, update, and delete an event.
I have been using React JS in my projects for quite some time now and am used to managing routing in my app using the react-router package. I have always been keen on having as little dependencies in my apps as possible, so, I always felt perturbed by the use of this particular package in simpler apps which did not have complex routes.
In this post, I will share my own point of view about React Hooks, and as the title of this post implies, I am not a big fan.
This article will walk you through the concepts you would need to know to step into the world of widely used ReactJS.