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react-extras
Advanced tools
Useful components and utilities for working with React
npm install react-extras
import React from 'react';
import {If} from 'react-extras';
const App = props => (
<If condition={props.showUnicorn}>
<div className="unicorn">
🦄
</div>
</If>
);
Automatically binds your React.Component
subclass methods to the instance. See the autoBind.react()
docs.
Conditionally join CSS class names together.
Type: string | object
Accepts a combination of strings and objects. Only object keys with truthy values are included. Anything else is ignored.
import {classNames} from 'react-extras';
classNames('unicorn', 'rainbow');
//=> 'unicorn rainbow'
classNames({awesome: true, foo: false}, 'unicorn', {rainbow: false});
//=> 'awesome unicorn'
classNames('unicorn', null, undefined, 0, 1, {foo: null});
//=> 'unicorn'
const buttonType = 'main';
classNames({[`button-${buttonType}`]: true});
//=> 'button-main'
import {classNames} from 'react-extras';
const Button = props => {
console.log(props);
/*
{
type: 'success',
small: true
}
*/
const buttonClass = classNames(
'button',
{
[`button-${props.type}`]: props.type,
'button-block': props.block,
'button-small': props.small
}
);
console.log(buttonClass);
//=> 'button button-success button-small'
return <button className={buttonClass}>…</button>;
};
<If>
React component that renders the children if the condition
prop is true
.
Beware that even though the children are not rendered when the condition
is false
, they're still evaluated.
If you need it to not be evaluated on false
, you can pass a function to the render
prop that returns the children:
import {If} from 'react-extras';
<div>
<If condition={props.error} render={() => (
<h1>{props.error}</h1>
)}/>
</div>
Or you could just use plain JavaScript:
<div>
{props.error && (
<h1>{props.error}</h1>
)}
</div>
<Choose>
React component similar to a switch case. <Choose>
has 2 children components:
<Choose.When>
that renders the children if the condition
prop is true
.<Choose.Otherwise>
that renders the children if has no <Choose.When>
with true
prop condition
.Note that even when the children are not rendered, they're still evaluated.
import {Choose} from 'react-extras';
<div>
<Choose>
<Choose.When condition={props.success}>
<h1>{props.success}</h1>
</Choose.When>
<Choose.When condition={props.error}>
<h1>{props.error}</h1>
</Choose.When>
<Choose.Otherwise>
<h1>😎</h1>
</Choose.Otherwise>
</Choose>
</div>
Or you could just use plain JavaScript:
<div>
{(() => {
if (props.success) {
return <h1>{props.success}</h1>;
}
if (props.error) {
return <h1>{props.error}</h1>;
}
return <h1>😎</h1>;
})()}
</div>
<For/>
React component that iterates over the of
prop and renders the render
prop.
import {For} from 'react-extras';
<div>
<For of={['🌈', '🦄', '😎']} render={(item, index) =>
<button key={index}>{item}</button>
}/>
</div>
Or you could just use plain JavaScript:
<div>
{['🌈', '🦄', '😎'].map((item, index) =>
<button key={index}>{item}</button>
)}
</div>
<Image/>
React component that improves the <img>
element.
It makes the image invisible if it fails to load instead of showing the default broken image icon. Optionally, specify a fallback image URL.
import {Image} from 'react-extras';
<Image
url="https://sindresorhus.com/unicorn.jpg"
fallbackUrl="https://sindresorhus.com/rainbow.jpg"
/>
It supports all the props that <img>
supports, but you use the prop url
instead of src
.
<RootClass/>
Renderless React component that can add and remove classes to the root <html>
element. It accepts an add
prop for adding classes, and a remove
prop for removing classes. Both accept either a single class or multiple classes separated by space.
import {RootClass} from 'react-extras';
<If condition={props.isDarkMode}>
<RootClass add="dark-mode"/>
</If>
import {RootClass} from 'react-extras';
<RootClass add="logged-in paid-user" remove="promo"/>
<BodyClass/>
Same as <RootClass/>
but for <body>
.
Prefer <RootClass/>
though, because it's nicer to put global classes on <html>
as you can consistently prefix everything with the class:
.dark-mode body {
background: #000;
}
.dark-mode a {
…
}
With <BodyClass/>
you need to do:
body.dark-mode {
background: #000;
}
.dark-mode a {
…
}
Returns a boolean of whether the given Component
is a functional stateless component.
Returns the display name of the given Component
.
A boolean of whether you're running in a context with a DOM. Can be used to check if your component is running in the browser or if it's being server-rendered.
FAQs
Useful components and utilities for working with React
The npm package react-extras receives a total of 1,396 weekly downloads. As such, react-extras popularity was classified as popular.
We found that react-extras 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.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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