hayyaksiandGitHub 703bd6177c Make the persistent-storage request observable and warn when it is denied (#33987)
* Make the persistent-storage request observable and warn when it is denied

The end-to-end encryption crypto store lives in IndexedDB. If the origin's storage is not
durable, Chromium can evict it under storage pressure, forcing a logout and recovery-key
re-entry. tryPersistStorage() requested navigator.storage.persist() but only logged the
boolean result, so a denial was invisible.

Make the request observable: it is now async and checks persisted() first (short-circuiting
to avoid re-requesting/re-prompting), a failure to query the state no longer blocks the
request, and a denial warns via the logger (captured by rageshakes) with a stronger
desktop-specific message. It never rejects - the sole caller treats it as fire-and-forget.

This makes the risk observable but cannot by itself guarantee durability: no Electron
main-process API can force per-origin persistence, so a complete cure needs a follow-up.

* Address review: log query errors, drop the requestStorageAccess fallback and the desktop-specific warning

- Include the caught error when the persisted-state query fails.
- Remove the document.requestStorageAccess branch: it is the Storage Access
  API (cross-site cookie/storage access), not durability, and all supported
  browsers (Safari >= 15.2 included) have navigator.storage.persist().
- Drop the desktop-specific suffix from the denial warning.
- Reword the fire-and-forget doc to avoid referencing the caller.
- Simplify the test harness: no descriptor save/restore, delete the stub in
  afterEach.
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Element

Element (formerly known as Vector and Riot) is a Matrix web & desktop client built using the Matrix JS SDK.

Supported Environments

Element has several tiers of support for different environments:

  • Supported
    • Definition:
      • Issues actively triaged, regressions block the release
    • Last 2 major versions of Chrome, Firefox, and Edge on desktop OSes
    • Last 2 versions of Safari
    • Latest release of official Element Desktop app on desktop OSes
    • Desktop OSes means macOS, Windows, and Linux versions for desktop devices that are actively supported by the OS vendor and receive security updates
  • Best effort
    • Definition:
      • Issues accepted, regressions do not block the release
      • The wider Element Products (including Element Call and the Enterprise Server Suite) do still not officially support these browsers.
      • The element web project and its contributors should keep the client functioning and gracefully degrade where other sibling features (E.g. Element Call) may not function.
    • Last major release of Firefox ESR and Chrome/Edge Extended Stable
  • Community Supported
    • Definition:
      • Issues accepted, regressions do not block the release
      • Community contributions are welcome to support these issues
    • Mobile web for current stable version of Chrome, Firefox, and Safari on Android, iOS, and iPadOS
  • Not supported
    • Definition: Issues only affecting unsupported environments are closed
    • Everything else

The period of support for these tiers should last until the releases specified above, plus 1 app release cycle(2 weeks). In the case of Firefox ESR this is extended further to allow it land in Debian Stable.

For accessing Element on an Android or iOS device, we currently recommend the native apps element-x-android and element-x-ios.

Getting Started

The easiest way to test Element is to just use the hosted copy at https://app.element.io. The develop branch is continuously deployed to https://develop.element.io for those who like living dangerously.

To host your own instance of Element see Installing Element Web.

To install Element as a desktop application, see Running as a desktop app below.


Monorepo

This repository is a monorepo hosting Element Web and other related projects in various subdirectories. You can read more about the structure here.

Element Web

To learn more about Element Web click here

Running as a Desktop app

Element can also be run as a desktop app, wrapped in Electron. You can download a pre-built version from https://element.io/get-started or, if you prefer, build it yourself.

To build it yourself, follow the instructions at https://github.com/element-hq/element-web/tree/develop/apps/desktop.

Many thanks to @aviraldg for the initial work on the Electron integration.

The configuration docs show how to override the desktop app's default settings if desired.

Development

Please read through the following:

  1. Developer guide
  2. Code style
  3. Contribution guide

Translations

To add a new translation, head to the translating doc.

For a developer guide, see the translating dev doc.

Triaging issues

Issues are triaged by community members and the Web App Team, following the triage process.

We use issue labels to sort all incoming issues.

Copyright (c) 2014-2017 OpenMarket Ltd Copyright (c) 2017 Vector Creations Ltd Copyright (c) 2017-2025 New Vector Ltd

This software is multi licensed by New Vector Ltd (Element). It can be used either:

(1) for free under the terms of the GNU Affero General Public License (as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version); OR

(2) for free under the terms of the GNU General Public License (as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version); OR

(3) under the terms of a paid-for Element Commercial License agreement between you and Element (the terms of which may vary depending on what you and Element have agreed to). Unless required by applicable law or agreed to in writing, software distributed under the Licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Licenses for the specific language governing permissions and limitations under the Licenses.

Please contact licensing@element.io to purchase an Element commercial license for this software.

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