javascript - div's id attribute is undefined/not getting captured onClick in a react app

Question

I'm mapping data from the api response and rendering multiple divs out of it. Along with that I'm assigning a unique id from the response to the id attribute of each div like this:

...lists.map(list => {
  return (
  <div className='one' key={list.id} id={list.id} onClick={this.handleClick}>
    <div className='two'>
      <p>Hello World</p>
      <span>Foo Bar</span>
    </div>
  </div>
)
})

handleClick = (e) => {
  console.log(e.target.id)
  // other stuff
}

The Problem:

Whenever the outer div (className='one') is clicked the console logs undefined. However, if I assign the id value to the inner div (className='two') it logs the value of id only if the click is made within the dimensions of the inner div. Same is the case with the <span> and <p> tags.

Basically, the onClick returns a different target on clicking different html elements.

Expected result:

Clicking the parent div or anywhere inside that div should always return the value of the id attribute of the parent div.

Answer 1

The thing is when you define onClick on the topMost parent, you need to use e.currentTarget.id instead of e.target.id since e.target will give you the element on which you clicked rather then the parent on which onClick listener is defined

class App extends React.Component {
state = {
  lists: [{id: 1}, {id: 2}, {id:3}]
}
render() {
  return (
    <div>
      {this.state.lists.map(list => {
          console.log(list.id)
          return (
          <div className='one' key={list.id} id={list.id} onClick={this.handleClick}>
            <div className='two'>
              <p>Hello World</p>
              <span>Foo Bar</span>
            </div>
          </div>
        )
       })
       }
    </div>
  )
}

handleClick = (e) => {
  console.log(e.currentTarget.id)
  
  // other stuff
}

}

ReactDOM.render(<App/>, document.getElementById('app'));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.js"></script>
<div id="app"></div>