Mar 5, 2024 Author - Sai gowtham

Call parent component method from a child component in React

react2min read

In this tutorial, we are going to learn about how to call a parent component method from the child component in React.

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Consider, we have two new components Parent, Child and we need to call Parent component method changeName() from the Child component.

Parent Component

Parent.js

import React, { Component } from 'react';
import Child from './Child';
class Parent extends Component {

  state = {
    name: "Gowtham"
  }

  changeName = ()=>{    this.setState({      name: "James"    })  }
  render() {
    return (
      <div>
         <Child name={this.state.name}/>      </div>
    );
  }
}
export default Parent;

Child Component

Child.js

import React from 'react';

function Child(props){
  const {name} = props;

  return (
      <div>
        <h1>Hello {name}</h1>
        <button>Change Name</button>
      </div>
  )
}

export default Child;

Calling parent component method

To call a parent component method from the child component, we need to pass the changeName() method as a prop to the child component and access it as a props data inside the child component.

Parent.js

import React, { Component } from 'react';
import Child from './Child';

class Parent extends Component {

  state = {
    name: "Gowtham"
  }

  changeName = ()=>{
    this.setState({
      name: "James"
    })
  }

  render() {
    return (
      <div>
         <Child name={this.state.name} changeName={this.changeName}/>      </div>
    );
  }
}
export default Parent;

In the above code, we have passed the changeName() method as a prop to the Child component.

Now, inside the Child component we can access the changeName() method from the props object.

Child.js

import React from 'react';

function Child(props){
  const {name,changeName} = props;
  return (
      <div>
        <h1>Hello {name}!</h1>
        <button onClick={changeName}>Change Name</button>      </div>
  )
}

export default Child;