react-logic-switch

A React component that lets you do conditional rendering, declaratively.

Quick start

npm install --save react-logic-switch

import { Switch, Case, Default } from 'react-logic-switch';

function MySwitchComponent({ isNightTime }) {
  return (
    <Switch arg={isNightTime}>
      <Case match={true}>
        <DarkModePage />
      </Case>
      <Default>
        <LightModePage />
      </Default>
    </Switch>
  );
}

Usage guide

react-logic-switch exports three React components: Switch, Case and Default. Any meaningful usage will require all 3 components.

Switch

Switch is the top-level React component. It only accepts Case components, and exactly one Default component, as children. It also takes an arg prop, which can be used to decide which Case to render.

Case

The Case component takes exactly one of either the test or match prop. These are used by the Switch parent to decide which component to render.

• match - If you pass a match prop, the parent Switch will render if it's the first Case component with a match value equal to the parent Switch component's arg prop.

• test - If you pass a function as a test prop, the parent Switch will call the function and use the output to decide whether to render the switch.

<Switch arg={friends}>
  <Case test={friends => friends.length > 3}>
    Chat with your friends!
  </Case>
  <Default>
    Connect with your friends!
  </Default>
</Switch>

If a Switch receives more than one matching Case, only the first one will be rendered.

Default

The Switch component will render the contents of the Default component if no Case children match.

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