I would like to catch all unhandled exceptions/rejections that take place within a javascript Promise. Is there a good method for catching them without adding a .catch(..) on each end of the Promise chain? (in case of forgetting to add this, the error silently disappears).

The developer console in Google Chrome can log them, I like to log them as well in a production environment.

For normal javascript exceptions I use the window.onerror function, but the errors from a Promise call this function.

Example:

window.onerror = function (e) {

    alert(unhandled error:  + e);

};



var p = new Promise(function (resolve, reject) {

    var nullObject = null;

    // Raise a TypeError: Cannot read property 'forceNullError' of null

    var x = nullObject.forceNullError(); 

    resolve();

});



p.then(function () { alert('success'); });

JSFiddle: https://jsfiddle.net/f7zwej6L/

*) I noticed that WinJS has a .done(..) method for what I want, but Native Promises don't.