[Child > Parent > Child] FirstChildComponent - Code Snippet for https://blog.nextzy.me/การส่งข้อมูลระหว่าง-parent-และ-child-componentใน-react-725eb793de7b

FirstChildComponent.jsx

import React, { Component } from 'react'
...

class FirstChildComponent extends Component {
  ...

  onConfirmClick = () => {
    const order = ...
    if (this.props.confirm) {
      this.props.confirm(order)
    }
  }

  render() {
    return (
      <React.Fragment>
        ...
        <button onClick={this.onConfirmClick}>Confirm</button>
      </React.Fragment>
    )
  }
}

export default FirstChildComponent