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docs: categorize breaking changes (#22834)
Co-authored-by: John Kleinschmidt <jkleinsc@github.com>
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Jeremy Apthorp
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@ -2,13 +2,19 @@
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Breaking changes will be documented here, and deprecation warnings added to JS code where possible, at least [one major version](tutorial/electron-versioning.md#semver) before the change is made.
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## `FIXME` comments
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### Types of Breaking Changes
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The `FIXME` string is used in code comments to denote things that should be fixed for future releases. See https://github.com/electron/electron/search?q=fixme
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This document uses the following convention to categorize breaking changes:
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- **API Changed:** An API was changed in such a way that code that has not been updated is guaranteed to throw an exception.
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- **Behavior Changed:** The behavior of Electron has changed, but not in such a way that an exception will necessarily be thrown.
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- **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.
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- **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.
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- **Removed:** An API or feature was removed, and is no longer supported by Electron.
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## Planned Breaking API Changes (10.0)
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### Browser Window Affinity
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### Removed: Browser Window Affinity
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The `affinity` option when constructing a new `BrowserWindow` will be removed
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as part of our plan to more closely align with Chromiums process model for security,
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@ -16,7 +22,7 @@ performance and maintainability.
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For more detailed information see [#18397](https://github.com/electron/electron/issues/18397).
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### `enableRemoteModule` defaults to `false`
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### Default Changed: `enableRemoteModule` defaults to `false`
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In Electron 9, using the remote module without explicitly enabling it via the
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`enableRemoteModule` WebPreferences option began emitting a warning. In
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@ -36,7 +42,7 @@ module](https://medium.com/@nornagon/electrons-remote-module-considered-harmful-
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## Planned Breaking API Changes (9.0)
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### Loading non-context-aware native modules in the renderer process
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### Default Changed: Loading non-context-aware native modules in the renderer process is disabled by default
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As of Electron 9 we do not allow loading of non-context-aware native modules in
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the renderer process. This is to improve security, performance and maintainability
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@ -48,7 +54,7 @@ you should plan to update your native modules to be context aware.
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For more detailed information see [#18397](https://github.com/electron/electron/issues/18397).
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### `<webview>.getWebContents()`
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### Removed: `<webview>.getWebContents()`
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This API, which was deprecated in Electron 8.0, is now removed.
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@ -60,7 +66,7 @@ const { remote } = require('electron')
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remote.webContents.fromId(webview.getWebContentsId())
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```
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### `webFrame.setLayoutZoomLevelLimits()`
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### Removed: `webFrame.setLayoutZoomLevelLimits()`
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Chromium has removed support for changing the layout zoom level limits, and it
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is beyond Electron's capacity to maintain it. The function was deprecated in
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@ -68,7 +74,7 @@ Electron 8.x, and has been removed in Electron 9.x. The layout zoom level limits
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are now fixed at a minimum of 0.25 and a maximum of 5.0, as defined
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[here](https://chromium.googlesource.com/chromium/src/+/938b37a6d2886bf8335fc7db792f1eb46c65b2ae/third_party/blink/common/page/page_zoom.cc#11).
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### Sending non-JS objects over IPC now throws an exception
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### Behavior Changed: Sending non-JS objects over IPC now throws an exception
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In Electron 8.0, IPC was changed to use the Structured Clone Algorithm,
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bringing significant performance improvements. To help ease the transition, the
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@ -84,14 +90,14 @@ In Electron 9.0, the old serialization algorithm has been removed, and sending
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such non-serializable objects will now throw an "object could not be cloned"
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error.
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### `shell.openItem` --> `shell.openPath`
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### API Changed: `shell.openItem` is now `shell.openPath`
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The `shell.openItem` API has been replaced with an asynchronous `shell.openPath` API.
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You can see the original API proposal and reasoning [here](https://github.com/electron/governance/blob/master/wg-api/spec-documents/shell-openitem.md).
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## Planned Breaking API Changes (8.0)
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### Values sent over IPC are now serialized with Structured Clone Algorithm
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### Behavior Changed: Values sent over IPC are now serialized with Structured Clone Algorithm
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The algorithm used to serialize objects sent over IPC (through
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`ipcRenderer.send`, `ipcRenderer.sendSync`, `WebContents.send` and related
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@ -142,7 +148,7 @@ these kinds of objects will throw a 'could not be cloned' error.
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[SCA]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
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### `<webview>.getWebContents()`
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### Deprecated: `<webview>.getWebContents()`
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This API is implemented using the `remote` module, which has both performance
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and security implications. Therefore its usage should be explicit.
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@ -183,7 +189,7 @@ const { ipcRenderer } = require('electron')
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ipcRenderer.invoke('openDevTools', webview.getWebContentsId())
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```
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### `webFrame.setLayoutZoomLevelLimits()`
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### Deprecated: `webFrame.setLayoutZoomLevelLimits()`
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Chromium has removed support for changing the layout zoom level limits, and it
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is beyond Electron's capacity to maintain it. The function will emit a warning
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@ -193,7 +199,7 @@ limits are now fixed at a minimum of 0.25 and a maximum of 5.0, as defined
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## Planned Breaking API Changes (7.0)
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### Node Headers URL
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### Deprecated: Atom.io Node Headers URL
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This is the URL specified as `disturl` in a `.npmrc` file or as the `--dist-url`
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command line flag when building native Node modules. Both will be supported for
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@ -203,7 +209,7 @@ Deprecated: https://atom.io/download/electron
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Replace with: https://electronjs.org/headers
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### `session.clearAuthCache(options)`
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### API Changed: `session.clearAuthCache()` no longer accepts options
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The `session.clearAuthCache` API no longer accepts options for what to clear, and instead unconditionally clears the whole cache.
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@ -214,25 +220,25 @@ session.clearAuthCache({ type: 'password' })
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session.clearAuthCache()
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```
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### `powerMonitor.querySystemIdleState`
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### API Changed: `powerMonitor.querySystemIdleState` is now `powerMonitor.getSystemIdleState`
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```js
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// Removed in Electron 7.0
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powerMonitor.querySystemIdleState(threshold, callback)
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// Replace with synchronous API
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const idleState = getSystemIdleState(threshold)
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const idleState = powerMonitor.getSystemIdleState(threshold)
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```
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### `powerMonitor.querySystemIdleTime`
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### API Changed: `powerMonitor.querySystemIdleTime` is now `powerMonitor.getSystemIdleState`
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```js
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// Removed in Electron 7.0
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powerMonitor.querySystemIdleTime(callback)
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// Replace with synchronous API
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const idleTime = getSystemIdleTime()
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const idleTime = powerMonitor.getSystemIdleTime()
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```
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### webFrame Isolated World APIs
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### API Changed: `webFrame.setIsolatedWorldInfo` replaces separate methods
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```js
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// Removed in Electron 7.0
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@ -249,11 +255,11 @@ webFrame.setIsolatedWorldInfo(
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})
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```
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### Removal of deprecated `marked` property on getBlinkMemoryInfo
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### Removed: `marked` property on `getBlinkMemoryInfo`
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This property was removed in Chromium 77, and as such is no longer available.
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### `webkitdirectory` attribute for `<input type="file"/>`
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### Behavior Changed: `webkitdirectory` attribute for `<input type="file"/>` now lists directory contents
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The `webkitdirectory` property on HTML file inputs allows them to select folders.
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Previous versions of Electron had an incorrect implementation where the `event.target.files`
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@ -286,9 +292,10 @@ In Electron 7, this now returns a `FileList` with a `File` object for:
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Note that `webkitdirectory` no longer exposes the path to the selected folder.
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If you require the path to the selected folder rather than the folder contents,
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see the `dialog.showOpenDialog` API ([link](https://github.com/electron/electron/blob/master/docs/api/dialog.md#dialogshowopendialogbrowserwindow-options)).
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## Planned Breaking API Changes (6.0)
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### `win.setMenu(null)`
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### API Changed: `win.setMenu(null)` is now `win.removeMenu()`
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```js
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// Deprecated
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@ -297,7 +304,7 @@ win.setMenu(null)
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win.removeMenu()
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```
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### `contentTracing.getTraceBufferUsage()`
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### API Changed: `contentTracing.getTraceBufferUsage()` is now a promise
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```js
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// Deprecated
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@ -310,7 +317,7 @@ contentTracing.getTraceBufferUsage().then(infoObject => {
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})
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```
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### `electron.screen` in renderer process
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### API Changed: `electron.screen` in the renderer process should be accessed via `remote`
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```js
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// Deprecated
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@ -319,7 +326,7 @@ require('electron').screen
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require('electron').remote.screen
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```
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### `require` in sandboxed renderers
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### API Changed: `require()`ing node builtins in sandboxed renderers no longer implicitly loads the `remote` version
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```js
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// Deprecated
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@ -343,25 +350,25 @@ require('path')
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require('electron').remote.require('path')
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```
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### `powerMonitor.querySystemIdleState`
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### Deprecated: `powerMonitor.querySystemIdleState` replaced with `powerMonitor.getSystemIdleState`
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```js
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// Deprecated
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powerMonitor.querySystemIdleState(threshold, callback)
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// Replace with synchronous API
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const idleState = getSystemIdleState(threshold)
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const idleState = powerMonitor.getSystemIdleState(threshold)
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```
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### `powerMonitor.querySystemIdleTime`
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### Deprecated: `powerMonitor.querySystemIdleTime` replaced with `powerMonitor.getSystemIdleTime`
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```js
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// Deprecated
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powerMonitor.querySystemIdleTime(callback)
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// Replace with synchronous API
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const idleTime = getSystemIdleTime()
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const idleTime = powerMonitor.getSystemIdleTime()
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```
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### `app.enableMixedSandbox`
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### Deprecated: `app.enableMixedSandbox()` is no longer needed
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```js
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// Deprecated
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Mixed-sandbox mode is now enabled by default.
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### `Tray`
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### Deprecated: `Tray.setHighlightMode`
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Under macOS Catalina our former Tray implementation breaks.
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Apple's native substitute doesn't support changing the highlighting behavior.
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## Planned Breaking API Changes (5.0)
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### `new BrowserWindow({ webPreferences })`
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### Default Changed: `nodeIntegration` and `webviewTag` default to false, `contextIsolation` defaults to true
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The following `webPreferences` option default values are deprecated in favor of the new defaults listed below.
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@ -403,16 +410,16 @@ const w = new BrowserWindow({
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})
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```
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### `nativeWindowOpen`
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### Behavior Changed: `nodeIntegration` in child windows opened via `nativeWindowOpen`
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Child windows opened with the `nativeWindowOpen` option will always have Node.js integration disabled, unless `nodeIntegrationInSubFrames` is `true.
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Child windows opened with the `nativeWindowOpen` option will always have Node.js integration disabled, unless `nodeIntegrationInSubFrames` is `true`.
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### Privileged Schemes Registration
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### API Changed: Registering privileged schemes must now be done before app ready
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Renderer process APIs `webFrame.setRegisterURLSchemeAsPrivileged` and `webFrame.registerURLSchemeAsBypassingCSP` as well as browser process API `protocol.registerStandardSchemes` have been removed.
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Renderer process APIs `webFrame.registerURLSchemeAsPrivileged` and `webFrame.registerURLSchemeAsBypassingCSP` as well as browser process API `protocol.registerStandardSchemes` have been removed.
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A new API, `protocol.registerSchemesAsPrivileged` has been added and should be used for registering custom schemes with the required privileges. Custom schemes are required to be registered before app ready.
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### webFrame Isolated World APIs
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### Deprecated: `webFrame.setIsolatedWorld*` replaced with `webFrame.setIsolatedWorldInfo`
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```js
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// Deprecated
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@ -429,7 +436,7 @@ webFrame.setIsolatedWorldInfo(
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})
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```
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## `webFrame.setSpellCheckProvider`
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### API Changed: `webFrame.setSpellCheckProvider` now takes an asynchronous callback
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The `spellCheck` callback is now asynchronous, and `autoCorrectWord` parameter has been removed.
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```js
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// Deprecated
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