How to fire onBlur event in React?

Question

I have an input field value that I want to format onBlur, here is what my code looks like:

Component:

  <Input
    onBlur={this.formatEndpoint}
  />

Function:

  formatEndpoint() {
    let endpoint = this.state.inputEndpoint;

    endpoint = endpoint.replace(/\s/g, '').replace(/\/+$/, '');

    if (endpoint.slice(-1) === '/') {
      endpoint = endpoint.substring(0, endpoint.length - 1);
    }

    console.log('anything');
  }

Why doesn't even the console.log() work onBlur? Thanks.

Solution

Thanks to the comments, I was able to figure it out. I had to add an onBlur prop to Input like so:

export default class Input extends React.Component {
  constructor() {
    super();
    this.handleBlur = this.handleBlur.bind(this);
  }

  handleBlur() {
    const { onBlur } = this.props;
    onBlur();
  }

  render() {
    return <input onBlur={this.handleBlur} />
  }
}

Input.propTypes = {
  onBlur: PropTypes.func,
};

Input.defaultProps = {
  onBlur: () => {},
};

Comments

[Panther]

Looks like its a custom input. You should check if the component supports onBlur.

[mikkelrd]

Yes, what does the definition of Input look like? Did you write it?

[Ralph David Abernathy]

These comments helped, I just had to add an onBlur prop to Input.