New Typescript 1.8.4 build error: “ Build: Property 'result' does not exist on type 'EventTarget'. ”

Question

I am New to typescript. In my Durandal application I migrated to VS-2012 to VS-2015 means typescript 0.9 to typescript 1.8.4. After migrated I got so many build errors. I re

Answer 1

Just let TypScript know what type you would expect it to be.

Here is the fix:

let reader = new FileReader();
reader.onload = function (event){
    let fileUrl = (event.target).result;
}

You could also use reader.result instead in this case