score:4

you have syntax errors (remove , after render, and as your are using es2015 class you can not use key: value syntax, instead use handleclick(e) {} ), change your code like this

class app extends react.component {
  render () {
    return <div onclick={this.handleclick}>hedlo</div>
  }

  handleclick(e) {
     alert('--')
  } 
}

example


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