JavaScript ReactJS : Edit Textbox which has already value in it

You can put the this.props.getValue value in the TextEditor component state when you create it and change that instead:

class TextEditor extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      emailIdValue: props.getValue
    };
  }

  // ...

  render() {
    return (
      <div>
        <input
          type="text"
          value={this.state.emailIdValue}
          onChange={this.onKeyPress}
        />
      </div>
    );
  }
}

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