react-remote-data-js v0.1.0

react-remote-data

A React component around remote-data-js, a JavaScript library aimed at modelling remote data and the states it can be in. This library provides a <RemoteData /> component to deal with fetching and displaying remote data or the error state.

npm install --save react-remote-data-js

There is also a build that will put this library in the global scope as window.ReactRemoteData. I recommend only using this for testing purposes - bundling via Browserify/Webpack/Rollup/etc is much better for proper application development.

Usage

import RemoteData from 'react-remote-data-js'

<RemoteData url="http://example.com/users/jack"
  notAsked={props => <div><button onClick={props.fetch}>Make Request</button></div>}
  pending={() => <p>Loading...</p>}
  success={props => <div><UserComponent user={props.request.data} /></div>}
  failure={props => <div><ApiErrorComponent error={props.request.data} /></div>}
/>

You can also see an example on JSBin and get code running immediately.

Render a RemoteData component and pass it the following props:

• url: String | Function the URL that the request will be made to.

Render a RemoteData component and pass it the following props:

• url: String | Function the URL that the request will be made to. If you give a function, it will be called with arguments that you give to the fetch function (see below for an example)
• notAsked: Function a function that takes properties given to it by the <RemoteDataJs> component and returns what will be rendered when the request is in the NotAsked state.
• pending, success and failure are all the same as notAsked but are used for the relevant state.

When notAsked, pending, success and failure are rendered, the function you provide is called with some props. They are:

• fetch: Function call props.fetch(...args) to start the request. This immediately turns the request to pending, and it will update to success or failure depending on the outcome of the request.
• request: RemoteDataJs this is the underlying instance of the RemoteDataJs object that this component wraps around. The bit you'll most likely be interested in is request.data, which contains the API response for a successful request, or an Error for a failed request.

Fetching URLs with parameters

Often you'll want to take a piece of data and use it to construct a URL. For example, you might have a form that lets a user type in a username to search your API for. In that case you need to define the url property as a function. You'll then need to update your call to props.fetch to pass in the username:

<RemoteData url={name => `http://example.com/users/${name}`}
  notAsked={props => <div><button onClick={() => props.fetch(this.state.userName)}>Make Request</button></div>}
  pending={() => <p>Loading...</p>}
  success={props => <div><UserComponent user={props.request.data} /></div>}
  failure={props => <div><ApiErrorComponent error={props.request.data} /></div>}
/>

Abstracting

You might have a common <Loading> component that you want to always use. In that case I recommend a simple wrapper component around <RemoteData> like so:

import Loading from './components/loading'

const MyRemoteData = props => (
  <RemoteData pending={() => <Loading />} {...props} />
)

You can do this with any of the properties that <RemoteData> expects.

Questions, problems, comments?

Would love to hear them! Please raise an issue on this repository.