react button events onclick onchange code example

Example 1: react bind function to component

class Foo extends Component {
  constructor(props) {
    super(props);
    this.handleClick = this.handleClick.bind(this);
  }
  handleClick() {
    console.log('Click happened');
  }
  render() {
    return <button onClick={this.handleClick}>Click Me</button>;
  }
}

Example 2: onclick re

handleClick(id) {

    this.setState({

        vote_status: !this.state.vote_status,

    })

    let vote_object = {
        voting_object: id,
        post_id: this.props.postId
    }
    this.props.submitvote(vote_object)

    //this.forceUpdate()
}

render() {

    console.log("getVoteStatus", this.props.getVoteStatus)

    let {contents, submitvote, postId, voted_id} = this.props

    return (

        <div className="txt_vote_bar_div" style={{
            color: voted_id === contents.post_poll_content_id ? 'white' : '#9da0a4',
            backgroundColor: this.state.vote_status ? '#0b97c4' : '#FFFFFF'
        }} id={contents.post_poll_content_id}>
            <p className="txt_vote_choice"
               style={{color: this.state.vote_status || voted_id === contents.post_poll_content_id ? '#FFFFFF' : '#6a6a6a'}}
               id={"id" + contents.post_poll_content_id}
               onClick={() => {
                   this.handleClick(contents.post_poll_content_id);

               }}> {contents.content} </p>
            <p className="txt_tot_votes"
               style={{color: this.state.vote_status || voted_id === contents.post_poll_content_id ? '#FFFFFF' : '#6a6a6a'}}> {contents.votes}%
                (Votes:)</p>
        </div>
    );
};