一次点击两次触发addEventListener

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #main{
            background-color: red;
            height: 400px;
            width: 400px;
        }
        #content{
            background-color: white;
            height: 100px;
            width: 100px;
        }
    </style>
</head>
<body>
    <div id="main">
        <div id="content">
            asdad
        </div>
    </div>
    <script>
        var main = document.getElementById('main');
        var content = document.getElementById('content');
        main.addEventListener('click', function () {
            console.log('main')
        }, true);
        content.addEventListener('click', function () {
           console.log('content') 
        }, true)
    </script>

</body>
</html>