Bug 187510

Summary: [FileAPI] FileReader.readAsArrayBuffer(null) should throw a Type Error
Product: WebKit Reporter: zac spitzer <zac.spitzer>
Component: WebCore JavaScriptAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: aestes, cdumez
Priority: P2    
Version: Safari 11   
Hardware: Unspecified   
OS: Unspecified   

Description zac spitzer 2018-07-10 00:35:26 PDT
Webkit currently just returns, all other major browsers do a type check and throw an error

var reader = new FileReader();
reader.onloadend = function(e) {
  console.log(e);
}
reader.readAsArrayBuffer(null);

https://jsbin.com/zonagopuhi/edit?html,js,console,output

https://trac.webkit.org/browser/webkit/trunk/Source/WebCore/fileapi/FileReader.cpp#L79

Here is the Chrome commit which added type checking for FileReader
https://groups.google.com/a/chromium.org/forum/#!topic/blink-reviews/vZxyVFHJ7MU