Missing definitions for events related to <input type='field' ...>

[simonh1000]

TypeScript Version:

1.7.5

Code

           var reader = new FileReader();

            reader.onload = function(evt) {
                // console.log(evt.target.result);
                debugger;
                resolve(evt.target.result);
                // resolve(evt.srcElement.result);
            };

Expected behavior:
code should pass typescript check

Actual behavior:
the .result fields are being marked as does not exist on EventTarget / Element

[RyanCavanaugh]

ref https://developer.mozilla.org/en-US/docs/Web/API/FileReader/onload

[YuichiNukiyama]

This issue relate to #299, #4163

[mhegazy]

looks like a duplicate of #4163