Sourced from electron's changelog.

Breaking Changes

Breaking changes will be documented here, and deprecation warnings added to JS code where possible, at least one major version before the change is made.

Types of Breaking Changes

This document uses the following convention to categorize breaking changes:

• API Changed: An API was changed in such a way that code that has not been updated is guaranteed to throw an exception.
• Behavior Changed: The behavior of Electron has changed, but not in such a way that an exception will necessarily be thrown.
• Default Changed: Code depending on the old default may break, not necessarily throwing an exception. The old behavior can be restored by explicitly specifying the value.
• Deprecated: An API was marked as deprecated. The API will continue to function, but will emit a deprecation warning, and will be removed in a future release.
• Removed: An API or feature was removed, and is no longer supported by Electron.

Planned Breaking API Changes (38.0)

Removed: macOS 11 support

macOS 11 (Big Sur) is no longer supported by Chromium.

Older versions of Electron will continue to run on Big Sur, but macOS 12 (Monterey) or later will be required to run Electron v38.0.0 and higher.

Planned Breaking API Changes (37.0)

Utility Process unhandled rejection behavior change

Utility Processes will now warn with an error message when an unhandled rejection occurs instead of crashing the process.

To restore the previous behavior, you can use:

process.on('unhandledRejection', () => {
  process.exit(1)
})

Behavior Changed: process.exit() kills utility process synchronously

Calling process.exit() in a utility process will now kill the utility process synchronously. This brings the behavior of process.exit() in line with Node.js behavior.

Please refer to the Node.js docs and [PR #45690](electron/electron#45690) to understand the potential implications of that, e.g., when calling console.log() before process.exit().

Behavior Changed: WebUSB and WebSerial Blocklist Support

... (truncated)

• db68805 chore: cherry-pick 3 changes from 0-M125 (#42221)
• cd25fbf chore: cherry-pick 1 changes from 0-M124 (#41985)
• 65d3530 fix: rename patches/devtools_frontend to patches/devtools-frontend (#42212)
• 1e054f3 chore: cherry-pick b3c01ac1e60a from v8 (#42176)
• c89546b chore: cherry-pick f320600cd1f4 from v8 (#42124)
• 19d3d66 chore: cherry-pick 19a4eebd05a7 from devtools-frontend (#42103)
• 196b6e6 chore: cherry-pick 1 changes from 3-M124 (#42091)
• b5262e4 chore: cherry-pick 013961609785 from chromium (#42092)
• 70cdc2e chore: cherry-pick b2cc7b7ac538 from chromium (#42098)
• b5eba90 chore: cherry-pick 8a3bfd4b7403 from devtools-frontend (#42093)
• Additional commits viewable in compare view

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