A way of explicitly reporting exceptions

[Andrea Giammarchi]

As I've said, I haven't seen anyone mentioning the handleEvent approach
that's able to give you any info and error and stack you want whenever you
want it inside any of its listeners

```javascript
// recycle one handler
// to handle errors too
var handler = {
  handleEvent: function (e) {
    this[e.type](e);
  },
  click: function (e) {
    console.log('before');
    WHATEVER++
  },
  error: function (e) {
    this._errors.push(e);
    console.log(e.message);
  },
  _errors: []
};

document.documentElement.addEventListener(
  'click', handler
);

document.documentElement.addEventListener(
  'click', function () {
    console.log('after');
  }
);

window.addEventListener('error', handler);

```

now click the page and see how it works.

You, owning such object, can check it anywhere you want through `this` or
direct reference and verify `._errors.length` and behave accordingly.


On Mon, Jun 23, 2014 at 1:50 PM, Boris Zbarsky <bzbarsky at mit.edu> wrote:

> On 6/23/14, 4:47 PM, Andrea Giammarchi wrote:
>
>> I am saying that if your requestAnimationFrame throws mine should keep
>> working without problems
>>
>
> OK.  That's the current behavior, and no one is proposing changing that.
>
> The discussion is about allowing that while usefully reporting the thrown
> exception at the same time.
>
> -Boris
>
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