index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<script>
    //    window.onerror = function(msg, url, row, col, error) {
    //        console.log(1,{
    //            msg,  url,  row, col, error
    //        });
    //        return true;
    //    }
    const round = (n, decimals = 0) => Number()

    function round(n,decimals = 0){
        return Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`)
    }


    window.addEventListener('error', (msg, url, row, col, error) => {
        debugger
        console.log(msg.target.src);
        return true;
    }, true);
</script>
<body>
<img src="sdfsdfsf">
<script>
    new Promise((resolve, reject) => {
        resolve();
    }).then(function () {
        throw 123
    })
</script>
</body>
</html>