what is the e in typescript code example

Example 1: react event typescript

handleChange(e: React.ChangeEvent<HTMLInputElement>) {
    // No longer need to cast to any - hooray for react!
    this.setState({temperature: e.target.value});
  }

  render() {
        ...
        <input value={temperature} onChange={this.handleChange} />
        ...
    );
  }

Example 2: e typescript

// For onChange

update = (e: React.ChangeEvent<HTMLInputElement>): void => {
    this.props.login[e.currentTarget.name] = e.currentTarget.value
}