Table of contents

• Motivation
• Inspiration
• Installation
• Components
  • OnOff
  • OnOffCollection
  • OnOffItem
• Related
• License

Motivation

Many UI components either have a single or multiple on/off states and require you to write the same type of stateful React components over and over again. It's not hard, but it takes time and duplicates code. Instead, we can extract common state requirements into generic, flexible and well-tested components and reuse them. This is what react-on-off is.

Inspiration

All credit for the design and API should go to react-toggled. If you only need to render a toggle component, go with react-toggled since it comes with functions that help with accessibility. If you're handling accessibility by yourself or you need to manage multiple on/off states, react-on-off is for you.

Installation

npm install --save react-on-off
# or
yarn add react-on-off

You can also use UMD builds from unpkg:

<script src="https://unpkg.com/react-on-off/lib/index.umd.js"></script>
<script src="https://unpkg.com/react-on-off/lib/index.umd.min.js"></script>

Components

OnOff

Manages a single, independent on/off state. Useful whenever you need to render something with two states.

Usage

import React from "react";
import { render } from "react-dom";
import { OnOff } from "react-on-off";

render(
  <OnOff>
    {({ on, toggle }) => (
      <>
        <h1>{on ? "Red" : "Blue"}</h1>
        <button onClick={toggle}>Switch pill</button>
      </>
    )}
  </OnOff>,
  document.getElementById("root")
);

Props

| Prop | Type | Default | Description | | --------------------------- | ---------- | ------- | ---------------------------------------------------------------------------------------- | | defaultOn optional | boolean | false | The initial on state. | | on optional | boolean | – | Control prop if you want to control the state by yourself. | | onChange optional | function | – | Called whenever the state changes with the new on state. | | children required | function | – | A render prop. This is where you render whatever you want based on the state of OnOff. |

Render object

OnOff expects the children prop to be a function. It is called with a single argument, an object with the following properties:

| Property | Type | Description | | -------- | ---------- | ---------------------------------------------------------------------- | | on | boolean | true if the state is on, false otherwise. | | off | boolean | Convenience property if you need !on. | | setOn | function | Sets the state to on. | | setOff | function | Sets the state to off. | | toggle | function | Toggles the state (i.e. when it's on, will set to off and vice versa). |

OnOffCollection

Manages multiple on/off states where only one state can be on at all times. To render the indivial on/off states, use OnOffItem anywhere inside an OnOffCollection parent.

Usage

import React from "react";
import { render } from "react-dom";
import { OnOffCollection, OnOffItem } from "react-on-off";

render(
  <OnOffCollection defaultOn="Home">
    <ul>
      {["Home", "About", "Contact"].map(stateId => (
        <OnOffItem id={stateId} key={stateId}>
          {({ id, on, setOn }) => (
            <li onClick={setOn} className={on ? "active" : null}>
              {id}
            </li>
          )}
        </OnOffItem>
      ))}
    </ul>
  </OnOffCollection>,
  document.getElementById("root")
);

Props

| Prop | Type | Default | Description | | --------------------------- | ---------- | ------- | ------------------------------------------------------------------------------------------------------------ | | defaultOn optional | string | – | The item id that should be on initially. | | on optional | string | – | Control prop if you want to control which item should be on. Either an id or null if no item should be on. | | onChange optional | function | – | Called whenever the state changes with the item id that is on. |

OnOffItem

Represents a single on/off state that is coupled to other on/off states. Doesn't do anything without an OnOffCollection parent.

Usage

See OnOffCollection Usage

Props

| Prop | Type | Default | Description | | -------------------------- | ---------- | ----------- | ------------------------------------------------------------------------------------------------------------------- | | id optional | string | a unique id | Only useful in combination with the defaultOn or onChange prop from OnOffCollection. Defaults to a unique id. | | children required | function | – | A render prop. This is where you render whatever you want based on the state of the OnOffItem. |

Render object

OnOffItem expects the children prop to be a function. It is called with a single argument, an object with the following properties:

| Property | Type | Description | | -------- | ---------- | ---------------------------------------------------------------------------------- | | id | string | The state id you set yourself or a generated unique id. | | on | boolean | true if the state is on, false otherwise. | | off | boolean | Convenience property if you need !on. | | setOn | function | Sets the state of the item to on. | | setOff | function | Sets the state of the item to off. | | toggle | function | Toggles the state of the item (i.e. when it's on, will set to off and vice versa). |

Related

• react-toggled
• react-powerplug

License

MIT