JS - click and not jump to top with preventDefault()

Question

  handleToggle(e) {
    e.preventDefault();
    this.setState( {
      isExpanded: !this.state.isExpanded
    })
  }

 

Answer 1

handleClick(e) {
  e.preventDefault();
  const { onClick } = this.props;
  onClick(e);
}

 

Answer 2

dancingDodo = e => {
 e.preventDefault();
 // do dancingDodo here
}

render() {
    return(
        <a onClick={this.dancingDodo} href="/">Dododo</a>
    );
}