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Fetch API also doesn't have any means of tracking progress, making it strictly inferior to XmlHTTPRequest

In fetch's defence it will in future once the Streams API is finalised: https://github.com/whatwg/fetch/issues/21

Fetch does have streaming uploads and downloads, and a quite some other features which doesn't come with xmlHttpRequest. Making it not strictly inferior to XMLHttpRequest

Will have. Future tense. Not present tense.

Present tense: https://domenic.github.io/streams-demo/

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