React Cond

Create components based on conditions, with ease.

Installation

Add @mariosant/react-cond to your package.json.

$ npm install @mariosant/react-cond

You can now import the module and use it like

import cond from '@mariosant/react-cond';

// Components
const Pending = () => 'Loading. Please wait...';
const NonIdeal = () => 'It seems there is an error!';
const Component = ({data}) => `This is the actual data: ${data}`;

// Predicates
const isPending = ({pending}) => pending;
const hasError = ({error}) => error;
const isOk = ({error, pending, data}) => !error && !pending && data;

// Final complex component
export const ComplexComponent = cond(
	[isPending, Pending],
	[hasError, NonIdeal],
	[isOk, Component],
	NonIdeal,
);

Usage

The package exports two main components you can use.

import cond, {hoc} from '@mariosant/react-cond';

The cond function takes a list of predicates and a default component if everything else fails.

const CommentsList = cond(
	[isPending, Pending], // Will render Pending if isPending returns true.
	[hasError, NonIdeal], // Will render NonIdeal if hasError returns true.
	[isOk, Component], // Will render Component if isOk returns true.
	NonIdeal, // If everything above fails, NonIdeal component will be rendered instead.
);

A predicate is a function. It will receive props and if it returns a truthy result, the associated component will be rendered.

For example,

import cond from '@mariosant/react-cond'

const isPending = ({pending}) => pending;
const Pending = () => <div>'Loading. Please wait.'</div>;

return cond(
	[isPending, Pending],
	...
);

For the developer's ease, a high order component version has been included. It can be easily combined with Recompose's compose.

import {hoc as cond} from '@mariosant/react-cond';
import {compose, withProps} from 'recompose';

return compose(
	withProps({something: true}),
	cond([isPending, Pending], [isOk, Component]),
)(DefaultComponent);

Meta

Marios Antonoudiou – @marios_ant – [email protected]

Distributed under the MIT license.

https://github.com/mariosant/react-cond

Contributing

1. Fork it (https://github.com/mariosant/react-cond/fork)
2. Create your feature branch (git checkout -b feature/fooBar)
3. Commit your changes using a semantic commit message.
4. Push to the branch (git push origin feature/fooBar)
5. Create a new Pull Request