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Add type to FileReader event target. #398

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Merged
merged 4 commits into from
Mar 30, 2018
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rch850
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@rch850 rch850 commented Mar 29, 2018

This PR fixes microsoft/TypeScript#4163.

The FileReader API spec says the event target is FileReader so I give FileReader type to target of ev.

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msftclas commented Mar 29, 2018

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onloadend: ((this: FileReader, ev: ProgressEvent) => any) | null;
onloadstart: ((this: FileReader, ev: ProgressEvent) => any) | null;
onprogress: ((this: FileReader, ev: ProgressEvent) => any) | null;
onabort: ((this: FileReader, ev: ProgressEvent & {target: FileReader}) => any) | null;
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i would create a new type FilreReaderProgressEvent that extends ProgressEvent and use that instead.

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Thank you for reviewing. I have added FileReaderProgressEvent.

readonly target: FileReader | null;
}

declare var FileReaderProgressEvent: {
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this should not be added. set "no-interface-object": 1, on the new interface to avoid the creation of a var.

"override-type": "FileReader | null"
}
}
}
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add "no-interface-object": 1,

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rch850 commented Mar 30, 2018

Removed unnecessary var FileReaderProgressEvent and made test passed.

@mhegazy mhegazy merged commit 3d9c46f into microsoft:master Mar 30, 2018
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mhegazy commented Mar 30, 2018

Thanks

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FileReader.onLoad/onLoadEnd event argument has no target.result property
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