The StringDelta type of the downloads API represents the difference between two strings.


Values of this type are objects. They contain the following properties:

A string representing the current string value.
A string representing the previous string value.

Browser compatibility

Chrome Edge Firefox Firefox for Android Opera
Basic Support Yes No 47.0 48.0 33


This API is based on Chromium's chrome.downloads API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

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 Last updated by: chrisdavidmills,