Release Notes for v4.0.0

Breaking Changes

• Upgraded to Chromium 69.0.3497.106 and Node 10.11.0. #13756, #14964, #14972
• Changed to the new single instance API. #12782, #14518
• Bumped minimum supported macOS version to 10.10. #15357

Features

• Added "will-move" event to the BrowserWindow. #14283
• Added BrowserWindow.setWindowButtonVisibility(). a42ca9ee
• Added Version key to Electron Framework Mac bundle's Info.plist. #14296
• Added systemPreferences APIs to help apps respect Mojave dark mode settings. #14755
• Added webPreferences.enableRemoteModule option allowing to disable the remote module to increase sandbox security. #15222
• Added getNormalBounds() API for the BrowserWindow class to fetch window bounds while minimized. #13290
• Added will-redirect event on webContents to capture, handle and prevent redirects during navigations. #13866
• Added an option to MenuItem that makes it possible to skip accelerator registration. #15840
• Added app.enableSandbox(). #14999
• Added creationTime method to process. #13542
• Added event.senderId property to IPCs sent via ipcRenderer.sendTo. #14395
• Added getUploadProgress API to the net module. #13783
• Added isCurrentlyAudible() to WebContents. #13614
• location url added to "Node.js Integration with Remote Content" warning. #13973
• Added media access APIs for macOS Mojave. #15948
• Added always-on-top-change event. #14951
• Added query, search and hash options to webContents.loadFile. #14515
• Added process.takeHeapSnapshot() and webContents.takeHeapSnapshot(). #14456
• Added screen reader support for Win32 toast notifications. #13834
• Added session.setPermissionCheckHandler(). #13925
• Added will-resize event to TopLevelWindow. #13649
• Added workingDirectory to shell.openExternal() options. #15065
• Added app.showAboutPanel() on macOS. #15680
• Added app.getGPUInfo(). #13486
• Added --disable-color-correct-rendering switch. #16020
• Allow partial setting of window bounds. #15699
• Added win.setShape() API to TopLevelWindow. #13789
• Allow window above full screen windows on macOS. #14122
• Allow filtering of remote.require() / remote.getGlobal() requests by handling remote-require / remote-get-global events. #15562
• Expose WebContents#setBackgroundThrottling. #15623
• Point based API's now automatically round incoming x and y values. #14604
• Expose several process object APIs to sandboxed renderers. #13505
• Added simplified Mojave dark mode APIs. #14895
• Support chrome:// URLs in default_app. #13575
• Enable use of NODE_OPTIONS env var. #15259
• Added a mediaType property to media permission requests to distinguish between video and audio requests. #14600
• menu.popup() options are now optional. #13977

Fixes

• Several process APIs were returning proxied values instead of simple ones. #13905
• Preload scripts could not be loaded with CSP enabled. #13032
• Correctly remove DOM storage limits. #15688
• Correctly mark crashReporter companyName as required. #14132
• Debugger command callbacks now run with null as the error when no error has occurred. #14814
• CORB checks are now disabled when web security preference is disabled. #15801
• OSR windows now respects display scale factor. #15865
• Prevent bluetooth device list from growing without bound. #15866
• Security warnings now correctly show in sandboxed renderers. #14869
• Fixed a crash on exit when using BrowserView. #15640
• Fixed a crash when using stream protocols. #15210
• Fixed shift-based accelerators not rendering correctly. #14966, #15401
• Fixed too-thin font rendering in macOS Mojave. #15007
• Fixed occasional freeze when navigating webview. #14487
• Honor properties.showHiddenFiles in dialog.showOpenDialog() on Linux. #15506
• Fixed incorrect display of 'zoom in' accelerator on mac. #15626
• Speech synthesis APIs now return OS voices on Windows. #14070
• Fixed CSP warnings in the default app. #13437
• Fixed notifications when running in a Windows Store environment. #13258
• On MacOS, closing notifications will now trigger the close Event. #13306
• Menu.buildFromTemplate() no longer creates empty MenuItems on falsey values. #13992
• Fixed multiple printing bugs. #15976
• Updated fs.stat/fs.statSync for new options param. #15350
• Partially fix the memory leak when opening child windows with nativeWindowOpen. #15190

Other Changes

• Changed build system from GYP to GN. #14097
• require('electron') performance improvements #14633
• Deprecated findInPage optionswordStart and medialCapitalAsWordStart. #15735
• Deprecated default webPreferences values for nodeIntegration, contextIsolation and webviewTag. #15045
• Fixed Widevine CDM not loading content. #14423
• Print a deprecation warning when the child windows opened with nativeWindowOpen option have node integration. #15193
• Removed experimentalCanvasFeatures property. #13684
• Removed legacy helpers (Electron Helper EH/NP). #14436
• Removed private webContents.getId() API. #13674
• On Windows, functions available on Windows 7+ are now statically linked. #13578
• Removed unneeded pyproto files from release archives. #15398
• In Electron 5.0, the default for nodeIntegration will change from true to false. Electron 4 will log a warning in the renderer when nodeIntegration is enabled by default. #16004
• Public IPC channel (ipcRenderer / ipcMain) is no longer used to implement Electron internals (remote module for example). #13940
• Removed WTL dependency on Windows. #13463
• Remove use of some deprecated Chromium APIs. #14420, #13312, #13436, #13425, #13703
• V8 embedder version string changed from -node.N to -electron.N. #15120
• Implement ipcRenderer.sendTo in native code for better performance. #14285
• Other small IPC efficiency improvements. #14302, #14286
• Warn if you try to use Electron APIs from a non-electron environment. #15977
• Move pepper flash behind feature flag. #13322

Dependencies

• Updated serve version from 6.5.3 to 6.5.8. #14159
• Upgraded sqlite from 3.24 to 3.26. #16073

Documentation

• Documentation changes: #12783, #13121, #13167, #13365, #13366, #13403, #13451, #13482, #13629, #13656, #13660, #13663, #13664, #13672, #13798, #13801, #13835, #13841, #13882, #13884, #13891, #13903, #13935, #13999, #14018, #14125, #14185, #14198, #14309, #14369, #14396, #14401, #14413, #14465, #14562, #14649, #14715, #14762, #14903, #15307, #15419, #15462, #15500, #15526, #15548, #15685, #15751, #15771, 379998e2, 4f8acb0c, 58e8c025, 9e85bdb0, e0735baf, #14823, #14526, 57d365a9, f788143c, #14455, #14731, #14301