detached-examples/extended-error-tracking/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="err1-btn" onclick="throwError1();">Error 1</button>
    <button id="err2-btn" onclick="throwError2();">Error 2</button>

    <script>
        function throwError1() { 
            var error = new Error("This is a 'critical' level error");

            error.level = 'critical';
            error.url   = 'https://my-domain.example.com';
            
            throw error;
        };
        function throwError2() {
            var error =  new Error("This is a 'warning' level error")

            error.level = 'warning';
            error.url   = 'https://foreign-domain.example.com';
            
            throw error;
        };

    </script>
</body>
</html>