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react event handler

 import React from 'react';


class Clock extends React.Component {
  state = {date : new Date(),locale : 'bn-BD'};
   
    componentDidMount(){
        this.clockTimer = setInterval(() =>this.tick(), 1000);
    }

    componentWillUnmount(){
        clearInterval(this.clockTimer);
    }

    tick(){
        this.setState({
            date : new Date(),
        });
    }

    handelClick = () => {
        this.setState({
          locale: 'en-US',
        });
    }

  render() {
    const {data,locale}= this.state;
    return(
      <div>
        <h1 className='heading'>
        <span className='text'>{this.state.date.toLocaleTimeString(locale)}</span>
      </h1>
      <button type='button' onClick={this.handelClick}>Click Me</button>
      </div>
    );
  }
}

export default Clock;

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