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Calling the parent's function from a child component in React

I was working on a modal dialog in React. When I click a button to verify the email address of a user, I wanted to display a confirmation dialog to make sure it’s a valid operation.

To show and hide an element in react is really simple.

{ this.state.dialog && <Dialog /> }

One tricky part for me who’s relatively react novice, was to control the state value from the child component, <Dialog />

It turned out simple quite. I pass the parent’s function to the child component as prop

hideDialog() { this.setState({ dialog: false }) }

render() {
  return (
    { this.state.dialog && <Dialog
        /> }

In the child component, I do this, simply

const Dialog = ({hideDialog}) => {

  return (
  <div className="modal" tabindex="-1" role="dialog"
    style= {{display: 'block', top: '20%'}}>
    <div className="modal-dialog">
      <div className="modal-content">
        <div className="modal-header">
          <h5 className="modal-title">Confirmation</h5>
          <button type="button" className="close" data-dismiss="modal" aria-label="Close"
            <span aria-hidden="true">&times;</span>

Function is no different from any other parameter. You just pass the function as prop.