Electron团队很兴奋的宣布，Electron 4的稳定发行版现已可用！你可以从 electronjs.org 或 从npm vianpm install electron@latest 这个版本包括升级、修复，我们迫不及待的看到你们用他们构建的东西阅读更多关于本发行版的详细信息，并分享你任何的使用反馈
What's New?
Electron的很大一部分功能由Chromium，Node.js和组成Electron的核心组件V8提供因此，Electron团队的一个关键目标是尽可能跟上这些项目的变化。 提供构建Electron应用程序的开发人员访问新的网页和JavaScript功能因此目的，Electron 4 的主要版本更新到每个组件；Electron v4.0.0 includes Chromium 69.0.3497.106, Node 10.11.0, and V8 6.9.427.24.
此外，Electron 4还包括了对Electron特定API的更改你可以在下面的 Electron 4 中找到一个主要更改的摘要； 对于更改的完整列表, 请阅读 Electron v4.0.0 发行日志
禁用 remote 模块
出于安全原因考量，你·现在可以禁用 remote 模块你可以对 BrowserWindow与 webview 标签禁用模块：
new BrowserWindow({
webPreferences: {
enableRemoteModule: false
}
})
<webview src="http://www.google.com/" enableremotemodule="false"></webview>
请参阅 BrowserWindow 以及 <webview> 标签 文档以获取更多信息
过滤 remote.require() / remote.getGlobal() Request
This feature is useful if you don't want to completely disable the remote module in your renderer process or webview but would like additional control over which modules can be required via remote.require.
When a module is required via remote.require in a renderer process, a remote-require event is raised on the app module. You can call event.preventDefault() on the the event (the first argument) to prevent the module from being loaded. The WebContents instance where the require occurred is passed as the second argument, and the name of the module is passed as the third argument. The same event is also emitted on the WebContents instance, but in this case the only arguments are the event and the module name. In both cases, you can return a custom value by setting the value of event.returnValue.
app.on('remote-require', function (event, webContents, requestedModuleName) {
});
browserWin.webContents.on(
'remote-require',
function (event, requestedModuleName) {
},
);
In a similar fashion, when remote.getGlobal(name) is called, a remote-get-global event is raised. This works the same way as the remote-require event: call preventDefault() to prevent the global from being returned, and set event.returnValue to return a custom value.
app.on(
'remote-get-global',
function (event, webContents, requrestedGlobalName) {
},
);
browserWin.webContents.on(
'remote-get-global',
function (event, requestedGlobalName) {
},
);
For more information, see the following documentation:
JavaScript Access to the About Panel
On macOS, you can now call app.showAboutPanel() to programmatically show the About panel, just like clicking the menu item created via {role: 'about'}. See the showAboutPanel documentation for more information
Controlling WebContents Background Throttling
WebContents instances now have a method setBackgroundThrottling(allowed) to enable or disable throttling of timers and animations when the page is backgrounded.
let win = new BrowserWindow(...)
win.webContents.setBackgroundThrotling(启用BackgroundThrottling)
win.webContents.setBackgroundThrottling(enableBackgroundThrottling)
See the setBackgroundThrottling documentation for more information.
重大更改
No More macOS 10.9 Support
Chromium no longer supports macOS 10.9 (OS X Mavericks), and as a result Electron 4.0 and beyond does not support it either.
Single Instance Locking
Previously, to make your app a Single Instance Application (ensuring that only one instance of your app is running at any given time), you could use the app.makeSingleInstance() method. Starting in Electron 4.0, you must use app.requestSingleInstanceLock() instead. The return value of this method indicates whether or not this instance of your application successfully obtained the lock. If it failed to obtain the lock, you can assume that another instance of your application is already running with the lock and exit immediately.
For an example of using requestSingleInstanceLock() and information on nuanced behavior on various platforms, see the documentation for app.requestSingleInstanceLock() and related methods and the second-instance event.
win_delay_load_hook
When building native modules for windows, the win_delay_load_hook variable in the module's binding.gyp must be true (which is the default). If this hook is not present, then the native module will fail to load on Windows, with an error message like Cannot find module. See the native module guide for more information.
Deprecations
The following breaking changes are planned for Electron 5.0, and thus are deprecated in Electron 4.0.
Node.js Integration Disabled for nativeWindowOpen-ed Windows
Starting in Electron 5.0, child windows opened with the nativeWindowOpen option will always have Node.js integration disabled.
webPreferences Default Values
When creating a new BrowserWindow with the webPreferences option set, the following webPreferences option defaults are deprecated in favor of new defaults listed below:
| Property | Deprecated Default | New Default |
|---|
contextIsolation | false | true |
nodeIntegration | true | false |
webviewTag | value of nodeIntegration if set, otherwise true | false |
Please note: there is currently a known bug (#9736) that prevents the webview tag from working if contextIsolation is on. Keep an eye on the GitHub issue for up-to-date information!
Learn more about context isolation, Node integration, and the webview tag in the Electron security document.
Electron 4.0 will still use the current defaults, but if you don't pass an explicit value for them, you'll see a deprecation warning. To prepare your app for Electron 5.0, use explicit values for these options. See the BrowserWindow docs for details on each of these options.
webContents.findInPage(text[, options])
The medialCapitalAsWordStart and wordStart options have been deprecated as they have been removed upstream.
应用反馈项目
The App Feedback Program we instituted during the development of Electron 3.0 was successful, so we've continued it during the development of 4.0 as well. We'd like to extend a massive thank you to Atlassian, Discord, MS Teams, OpenFin, Slack, Symphony, WhatsApp, and the other program members for their involvement during the 4.0 beta cycle. To learn more about the App Feedback Program and to participate in future betas, check out our blog post about the program.
接下来
在短期内，您可以期待团队继续专注于跟上构成 Electron 的主要组件的开发，包括 Chromium、Node 和 V8。尽管我们谨慎地避免对发布日期做出承诺，但我们的计划是大约每季度发布一次 Electron 的新主要版本以及这些组件的新版本。关于 Electron 版本的更多详细信息，请看我们的 版本管理文档
For information on planned breaking changes in upcoming versions of Electron, see our Planned Breaking Changes doc.
