index.md

---

title: downloads.BooleanDelta
slug: Mozilla/Add-ons/WebExtensions/API/downloads/BooleanDelta
page-type: webextension-api-type
tags:
  - API
  - Add-ons
  - BooleanDelta
  - Extensions
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - downloads
browser-compat: webextensions.api.downloads.BooleanDelta

---

{{AddonSidebar()}}

The BooleanDelta type of the {{WebExtAPIRef("downloads")}} API represents the difference between two booleans.

Type

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

• current {{optional_inline}}

  • : A boolean representing the current boolean value.

• previous {{optional_inline}}

  • : A boolean representing the previous boolean value.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

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