问JavaScript:检查单击按钮后是否发生了事件

EN

const mainEntries = document.querySelector('#main');

const clickFunction = e => {
  if (e.target.tagName === 'BUTTON' && e.target.classList.contains('go')) {
    const firstCellSameRow = e.target.closest('tr').cells.item(0).innerText;
    console.log('GO button clicked. First cell\'s text at the same row is ', firstCellSameRow);
  }
  else {
    console.log('Main div clicked outside of GO button');
  }
}

mainEntries.addEventListener('click', clickFunction);

<div id=main>
     <div class='info'>
        <p>Name: <span class='x'>ABC</span></p>
        <p>Number: <span class='x'>0</span></p>
        <table class='newTable'>
            <tr>
                <th>
                    Number
                </th>
                <th>    
                    Value
                </th>
                <th>    
                    Go
                </th>

            </tr>
            <tr>
                <td>
                    0
                </td>
                <td>
                    <span class='k'>11.7</span>
                </td>
                <td>
                    <button class='go'>Go</button>
                </td>
            </tr>
            <tr>
                <td>
                    2
                </td>
                <td>
                    <span class='k'>8.5</span>
                </td>
                <td>
                    <button class='go'>Go</button>
                </td>
            </tr>
        </table>
    </div>
</div>