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React: How to show a different component on click

Updated Sep 13 2021

In many scenarios you want to display a completely different component inside a screen, when a button or link is clicked.

Think about a navigation structure, for example.

How can you do so?

In this example I’m managing the state centralized in the App component.

import React from 'react'

const AddTripButton = (props) => {
  return <button onClick={props.addTrip}>Add a trip</button>
}

export default AddTripButton

Then in the App component, handle the addTrip event by assigning it the triggerAddTripState method:

<AddTripButton addTrip={this.triggerAddTripState} />

With React hooks, first import useState:

import { useState } from 'react'

then declare a “state” variable:

const [state, setState] = useState('start')

In the JSX you show and hide different components based on this state value:

function App() {
  const [state, setState] = useState('start')

  return (
    <div>
      {state === 'start' && (
        <AddTripButton addTrip={() => setState('add-trip') } />
      )}

      {state === 'add-trip' && <AnotherComponent />}
    </div>
  )
}