How to set default Checked in checkbox ReactJS?

Question

I\'m having trouble to update the checkbox state after it\'s assigned with default value checked="checked" in React.

var rCheck = React         


        

Answer 1

There are a few ways to accomplish this, here's a few:

Written using State Hooks:

function Checkbox() {
  const [checked, setChecked] = React.useState(true);

  return (
    
       setChecked(!checked)}
      />
      Check Me!
    
  );
}

ReactDOM.render(
  ,
  document.getElementById('checkbox'),
);

Here is a live demo on JSBin.

Written using Components:

class Checkbox extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      isChecked: true,
    };
  }
  toggleChange = () => {
    this.setState({
      isChecked: !this.state.isChecked,
    });
  }
  render() {
    return (
      
        
        Check Me!
      
    );
  }
}

ReactDOM.render(
  ,
  document.getElementById('checkbox'),
);

Here is a live demo on JSBin.