1132 lines
30 KiB
Markdown
1132 lines
30 KiB
Markdown
# browser-window
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The `BrowserWindow` class gives you ability to create a browser window, an
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example is:
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```javascript
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var BrowserWindow = require('browser-window');
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var win = new BrowserWindow({ width: 800, height: 600, show: false });
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win.on('closed', function() {
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win = null;
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});
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win.loadUrl('https://github.com');
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win.show();
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```
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You can also create a window without chrome by using
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[Frameless Window](frameless-window.md) API.
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## Class: BrowserWindow
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`BrowserWindow` is an
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[EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).
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### new BrowserWindow(options)
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* `options` Object
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* `x` Integer - Window's left offset to screen
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* `y` Integer - Window's top offset to screen
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* `width` Integer - Window's width
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* `height` Integer - Window's height
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* `use-content-size` Boolean - The `width` and `height` would be used as web
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page's size, which means the actual window's size will include window
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frame's size and be slightly larger.
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* `center` Boolean - Show window in the center of the screen
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* `min-width` Integer - Minimum width
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* `min-height` Integer - Minimum height
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* `max-width` Integer - Maximum width
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* `max-height` Integer - Maximum height
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* `resizable` Boolean - Whether window is resizable
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* `always-on-top` Boolean - Whether the window should always stay on top of
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other windows
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* `fullscreen` Boolean - Whether the window should show in fullscreen, when
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set to `false` the fullscreen button would also be hidden on OS X
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* `skip-taskbar` Boolean - Do not show window in taskbar
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* `zoom-factor` Number - The default zoom factor of the page, zoom factor is
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zoom percent / 100, so `3.0` represents `300%`
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* `kiosk` Boolean - The kiosk mode
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* `title` String - Default window title
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* `icon` [NativeImage](native-image.md) - The window icon, when omitted on
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Windows the executable's icon would be used as window icon
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* `show` Boolean - Whether window should be shown when created
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* `frame` Boolean - Specify `false` to create a
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[Frameless Window](frameless-window.md)
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* `node-integration` Boolean - Whether node integration is enabled, default
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is `true`
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* `accept-first-mouse` Boolean - Whether the web view accepts a single
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mouse-down event that simultaneously activates the window
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* `disable-auto-hide-cursor` Boolean - Do not hide cursor when typing
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* `auto-hide-menu-bar` Boolean - Auto hide the menu bar unless the `Alt`
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key is pressed.
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* `enable-larger-than-screen` Boolean - Enable the window to be resized larger
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than screen.
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* `dark-theme` Boolean - Forces using dark theme for the window, only works on
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some GTK+3 desktop environments
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* `preload` String - Specifies a script that will be loaded before other
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scripts run in the window. This script will always have access to node APIs
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no matter whether node integration is turned on for the window, and the path
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of `preload` script has to be absolute path.
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* `transparent` Boolean - Makes the window [transparent](frameless-window.md)
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* `type` String - Specifies the type of the window, possible types are
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`desktop`, `dock`, `toolbar`, `splash`, `notification`. This only works on
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Linux.
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* `standard-window` Boolean - Uses the OS X's standard window instead of the
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textured window. Defaults to `true`.
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* `web-preferences` Object - Settings of web page's features
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* `javascript` Boolean
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* `web-security` Boolean
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* `images` Boolean
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* `java` Boolean
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* `text-areas-are-resizable` Boolean
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* `webgl` Boolean
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* `webaudio` Boolean
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* `plugins` Boolean - Whether plugins should be enabled, currently only
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`NPAPI` plugins are supported.
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* `extra-plugin-dirs` Array - Array of paths that would be searched for
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plugins. Note that if you want to add a directory under your app, you
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should use `__dirname` or `process.resourcesPath` to join the paths to
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make them absolute, using relative paths would make Electron search
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under current working directory.
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* `experimental-features` Boolean
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* `experimental-canvas-features` Boolean
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* `subpixel-font-scaling` Boolean
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* `overlay-scrollbars` Boolean
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* `overlay-fullscreen-video` Boolean
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* `shared-worker` Boolean
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* `direct-write` Boolean - Whether the DirectWrite font rendering system on
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Windows is enabled
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* `page-visibility` Boolean - Page would be forced to be always in visible
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or hidden state once set, instead of reflecting current window's
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visibility. Users can set it to `true` to prevent throttling of DOM
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timers.
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Creates a new `BrowserWindow` with native properties set by the `options`.
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Usually you only need to set the `width` and `height`, other properties will
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have decent default values.
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### Event: 'page-title-updated'
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* `event` Event
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Emitted when the document changed its title, calling `event.preventDefault()`
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would prevent the native window's title to change.
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### Event: 'close'
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* `event` Event
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Emitted when the window is going to be closed. It's emitted before the
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`beforeunload` and `unload` event of DOM, calling `event.preventDefault()`
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would cancel the close.
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Usually you would want to use the `beforeunload` handler to decide whether the
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window should be closed, which will also be called when the window is
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reloaded. In Electron, returning an empty string or `false` would cancel the
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close. An example is:
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```javascript
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window.onbeforeunload = function(e) {
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console.log('I do not want to be closed');
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// Unlike usual browsers, in which a string should be returned and the user is
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// prompted to confirm the page unload, Electron gives developers more options.
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// Returning empty string or false would prevent the unloading now.
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// You can also use the dialog API to let the user confirm closing the application.
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return false;
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};
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```
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### Event: 'closed'
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Emitted when the window is closed. After you have received this event you should
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remove the reference to the window and avoid using it anymore.
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### Event: 'unresponsive'
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Emitted when the web page becomes unresponsive.
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### Event: 'responsive'
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Emitted when the unresponsive web page becomes responsive again.
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### Event: 'blur'
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Emitted when window loses focus.
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### Event: 'focus'
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Emitted when window gains focus.
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### Event: 'maximize'
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Emitted when window is maximized.
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### Event: 'unmaximize'
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Emitted when window exits from maximized state.
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### Event: 'minimize'
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Emitted when window is minimized.
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### Event: 'restore'
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Emitted when window is restored from minimized state.
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### Event: 'resize'
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Emitted when window is getting resized.
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### Event: 'move'
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Emitted when the window is getting moved to a new position.
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__Note__: On OS X this event is just an alias of `moved`.
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### Event: 'moved'
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Emitted once when the window is moved to a new position.
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__Note__: This event is available only on OS X.
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### Event: 'enter-full-screen'
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Emitted when window enters full screen state.
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### Event: 'leave-full-screen'
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Emitted when window leaves full screen state.
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### Event: 'enter-html-full-screen'
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Emitted when window enters full screen state triggered by html api.
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### Event: 'leave-html-full-screen'
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Emitted when window leaves full screen state triggered by html api.
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### Event: 'devtools-opened'
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Emitted when devtools is opened.
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### Event: 'devtools-closed'
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Emitted when devtools is closed.
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### Event: 'devtools-focused'
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Emitted when devtools is focused / opened.
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### Class Method: BrowserWindow.getAllWindows()
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Returns an array of all opened browser windows.
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### Class Method: BrowserWindow.getFocusedWindow()
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Returns the window that is focused in this application.
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### Class Method: BrowserWindow.fromWebContents(webContents)
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* `webContents` WebContents
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Find a window according to the `webContents` it owns
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### Class Method: BrowserWindow.fromId(id)
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* `id` Integer
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Find a window according to its ID.
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### Class Method: BrowserWindow.addDevToolsExtension(path)
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* `path` String
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Adds devtools extension located at `path`, and returns extension's name.
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The extension will be remembered so you only need to call this API once, this
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API is not for programming use.
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### Class Method: BrowserWindow.removeDevToolsExtension(name)
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* `name` String
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Remove the devtools extension whose name is `name`.
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### BrowserWindow.webContents
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The `WebContents` object this window owns, all web page related events and
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operations would be done via it.
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**Note:** Users should never store this object because it may become `null`
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when the renderer process (web page) has crashed.
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### BrowserWindow.devToolsWebContents
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Get the `WebContents` of devtools of this window.
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**Note:** Users should never store this object because it may become `null`
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when the devtools has been closed.
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### BrowserWindow.id
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Get the unique ID of this window.
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### BrowserWindow.destroy()
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Force closing the window, the `unload` and `beforeunload` event won't be emitted
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for the web page, and `close` event would also not be emitted
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for this window, but it would guarantee the `closed` event to be emitted.
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You should only use this method when the renderer process (web page) has crashed.
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### BrowserWindow.close()
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Try to close the window, this has the same effect with user manually clicking
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the close button of the window. The web page may cancel the close though, see
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the [close event](#event-close).
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### BrowserWindow.focus()
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Focus on the window.
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### BrowserWindow.isFocused()
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Returns whether the window is focused.
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### BrowserWindow.show()
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Shows and gives focus to the window.
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### BrowserWindow.showInactive()
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Shows the window but doesn't focus on it.
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### BrowserWindow.hide()
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Hides the window.
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### BrowserWindow.isVisible()
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Returns whether the window is visible to the user.
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### BrowserWindow.maximize()
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Maximizes the window.
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### BrowserWindow.unmaximize()
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Unmaximizes the window.
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### BrowserWindow.isMaximized()
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Returns whether the window is maximized.
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### BrowserWindow.minimize()
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Minimizes the window. On some platforms the minimized window will be shown in
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the Dock.
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### BrowserWindow.restore()
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Restores the window from minimized state to its previous state.
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### BrowserWindow.isMinimized()
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Returns whether the window is minimized.
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### BrowserWindow.setFullScreen(flag)
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* `flag` Boolean
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Sets whether the window should be in fullscreen mode.
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### BrowserWindow.isFullScreen()
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Returns whether the window is in fullscreen mode.
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### BrowserWindow.setBounds(options)
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* `options` Object
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* `x` Integer
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* `y` Integer
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* `width` Integer
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* `height` Integer
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Resizes and moves the window to `width`, `height`, `x`, `y`.
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### BrowserWindow.getBounds()
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Returns an object that contains window's width, height, x and y values.
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### BrowserWindow.setSize(width, height)
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* `width` Integer
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* `height` Integer
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Resizes the window to `width` and `height`.
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### BrowserWindow.getSize()
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Returns an array that contains window's width and height.
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### BrowserWindow.setContentSize(width, height)
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* `width` Integer
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* `height` Integer
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Resizes the window's client area (e.g. the web page) to `width` and `height`.
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### BrowserWindow.getContentSize()
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Returns an array that contains window's client area's width and height.
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### BrowserWindow.setMinimumSize(width, height)
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* `width` Integer
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* `height` Integer
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Sets the minimum size of window to `width` and `height`.
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### BrowserWindow.getMinimumSize()
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Returns an array that contains window's minimum width and height.
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### BrowserWindow.setMaximumSize(width, height)
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* `width` Integer
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* `height` Integer
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Sets the maximum size of window to `width` and `height`.
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### BrowserWindow.getMaximumSize()
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Returns an array that contains window's maximum width and height.
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### BrowserWindow.setResizable(resizable)
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* `resizable` Boolean
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Sets whether the window can be manually resized by user.
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### BrowserWindow.isResizable()
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Returns whether the window can be manually resized by user.
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### BrowserWindow.setAlwaysOnTop(flag)
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* `flag` Boolean
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Sets whether the window should show always on top of other windows. After
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setting this, the window is still a normal window, not a toolbox window which
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can not be focused on.
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### BrowserWindow.isAlwaysOnTop()
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Returns whether the window is always on top of other windows.
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### BrowserWindow.center()
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Moves window to the center of the screen.
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### BrowserWindow.setPosition(x, y)
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* `x` Integer
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* `y` Integer
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Moves window to `x` and `y`.
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### BrowserWindow.getPosition()
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Returns an array that contains window's current position.
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### BrowserWindow.setTitle(title)
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* `title` String
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Changes the title of native window to `title`.
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### BrowserWindow.getTitle()
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Returns the title of the native window.
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**Note:** The title of web page can be different from the title of the native
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window.
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### BrowserWindow.flashFrame(flag)
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* `flag` Boolean
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Starts or stops flashing the window to attract user's attention.
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### BrowserWindow.setSkipTaskbar(skip)
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* `skip` Boolean
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Makes the window not show in the taskbar.
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### BrowserWindow.setKiosk(flag)
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* `flag` Boolean
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Enters or leaves the kiosk mode.
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### BrowserWindow.isKiosk()
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Returns whether the window is in kiosk mode.
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### BrowserWindow.setRepresentedFilename(filename)
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* `filename` String
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Sets the pathname of the file the window represents, and the icon of the file
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will show in window's title bar.
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__Note__: This API is only available on OS X.
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### BrowserWindow.getRepresentedFilename()
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Returns the pathname of the file the window represents.
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__Note__: This API is only available on OS X.
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### BrowserWindow.setDocumentEdited(edited)
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* `edited` Boolean
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Specifies whether the window’s document has been edited, and the icon in title
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bar will become grey when set to `true`.
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__Note__: This API is only available on OS X.
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### BrowserWindow.IsDocumentEdited()
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Whether the window's document has been edited.
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__Note__: This API is only available on OS X.
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### BrowserWindow.openDevTools([options])
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* `options` Object
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* `detach` Boolean - opens devtools in a new window
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Opens the developer tools.
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### BrowserWindow.closeDevTools()
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Closes the developer tools.
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### BrowserWindow.isDevToolsOpened()
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Returns whether the developer tools are opened.
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### BrowserWindow.toggleDevTools()
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Toggle the developer tools.
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### BrowserWindow.inspectElement(x, y)
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* `x` Integer
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* `y` Integer
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Starts inspecting element at position (`x`, `y`).
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### BrowserWindow.inspectServiceWorker()
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Opens the developer tools for the service worker context present in the web contents.
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### BrowserWindow.focusOnWebView()
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### BrowserWindow.blurWebView()
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### BrowserWindow.capturePage([rect, ]callback)
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||
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* `rect` Object - The area of page to be captured
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* `x` Integer
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* `y` Integer
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||
* `width` Integer
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||
* `height` Integer
|
||
* `callback` Function
|
||
|
||
Captures the snapshot of page within `rect`, upon completion `callback` would be
|
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called with `callback(image)`, the `image` is an instance of
|
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[NativeImage](native-image.md) that stores data of the snapshot. Omitting the
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`rect` would capture the whole visible page.
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|
||
**Note:** Be sure to read documents on remote buffer in
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[remote](remote.md) if you are going to use this API in renderer
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process.
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### BrowserWindow.print([options])
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Same with `webContents.print([options])`
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### BrowserWindow.printToPDF(options, callback)
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Same with `webContents.printToPDF(options, callback)`
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### BrowserWindow.loadUrl(url, [options])
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Same with `webContents.loadUrl(url, [options])`.
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### BrowserWindow.reload()
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Same with `webContents.reload`.
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### BrowserWindow.setMenu(menu)
|
||
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||
* `menu` Menu
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||
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||
Sets the `menu` as the window's menu bar, setting it to `null` will remove the
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menu bar.
|
||
|
||
__Note:__ This API is not available on OS X.
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|
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### BrowserWindow.setProgressBar(progress)
|
||
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* `progress` Double
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|
||
Sets progress value in progress bar. Valid range is [0, 1.0].
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|
||
Remove progress bar when progress < 0;
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||
Change to indeterminate mode when progress > 1.
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||
|
||
On Linux platform, only supports Unity desktop environment, you need to specify
|
||
the `*.desktop` file name to `desktopName` field in `package.json`. By default,
|
||
it will assume `app.getName().desktop`.
|
||
|
||
### BrowserWindow.setOverlayIcon(overlay, description)
|
||
|
||
* `overlay` [NativeImage](native-image.md) - the icon to display on the bottom
|
||
right corner of the taskbar icon. If this parameter is `null`, the overlay is
|
||
cleared
|
||
* `description` String - a description that will be provided to Accessibility
|
||
screen readers
|
||
|
||
Sets a 16px overlay onto the current taskbar icon, usually used to convey some sort of application status or to passively notify the user.
|
||
|
||
__Note:__ This API is only available on Windows (Windows 7 and above)
|
||
|
||
### BrowserWindow.showDefinitionForSelection()
|
||
|
||
Shows pop-up dictionary that searches the selected word on the page.
|
||
|
||
__Note__: This API is only available on OS X.
|
||
|
||
### BrowserWindow.setAutoHideMenuBar(hide)
|
||
|
||
* `hide` Boolean
|
||
|
||
Sets whether the window menu bar should hide itself automatically. Once set the
|
||
menu bar will only show when users press the single `Alt` key.
|
||
|
||
If the menu bar is already visible, calling `setAutoHideMenuBar(true)` won't
|
||
hide it immediately.
|
||
|
||
### BrowserWindow.isMenuBarAutoHide()
|
||
|
||
Returns whether menu bar automatically hides itself.
|
||
|
||
### BrowserWindow.setMenuBarVisibility(visible)
|
||
|
||
* `visible` Boolean
|
||
|
||
Sets whether the menu bar should be visible. If the menu bar is auto-hide, users
|
||
can still bring up the menu bar by pressing the single `Alt` key.
|
||
|
||
### BrowserWindow.isMenuBarVisible()
|
||
|
||
Returns whether the menu bar is visible.
|
||
|
||
### BrowserWindow.setVisibleOnAllWorkspaces(visible)
|
||
|
||
* `visible` Boolean
|
||
|
||
Sets whether the window should be visible on all workspaces.
|
||
|
||
**Note:** This API does nothing on Windows.
|
||
|
||
### BrowserWindow.isVisibleOnAllWorkspaces()
|
||
|
||
Returns whether the window is visible on all workspaces.
|
||
|
||
**Note:** This API always returns false on Windows.
|
||
|
||
## Class: WebContents
|
||
|
||
A `WebContents` is responsible for rendering and controlling a web page.
|
||
|
||
`WebContents` is an
|
||
[EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).
|
||
|
||
### Event: 'did-finish-load'
|
||
|
||
Emitted when the navigation is done, i.e. the spinner of the tab will stop
|
||
spinning, and the `onload` event was dispatched.
|
||
|
||
### Event: 'did-fail-load'
|
||
|
||
* `event` Event
|
||
* `errorCode` Integer
|
||
* `errorDescription` String
|
||
|
||
This event is like `did-finish-load`, but emitted when the load failed or was
|
||
cancelled, e.g. `window.stop()` is invoked.
|
||
|
||
### Event: 'did-frame-finish-load'
|
||
|
||
* `event` Event
|
||
* `isMainFrame` Boolean
|
||
|
||
Emitted when a frame has done navigation.
|
||
|
||
### Event: 'did-start-loading'
|
||
|
||
Corresponds to the points in time when the spinner of the tab starts spinning.
|
||
|
||
### Event: 'did-stop-loading'
|
||
|
||
Corresponds to the points in time when the spinner of the tab stops spinning.
|
||
|
||
### Event: 'did-get-response-details'
|
||
|
||
* `event` Event
|
||
* `status` Boolean
|
||
* `newUrl` String
|
||
* `originalUrl` String
|
||
* `httpResponseCode` Integer
|
||
* `requestMethod` String
|
||
* `referrer` String
|
||
* `headers` Object
|
||
|
||
Emitted when details regarding a requested resource is available.
|
||
`status` indicates the socket connection to download the resource.
|
||
|
||
### Event: 'did-get-redirect-request'
|
||
|
||
* `event` Event
|
||
* `oldUrl` String
|
||
* `newUrl` String
|
||
* `isMainFrame` Boolean
|
||
|
||
Emitted when a redirect was received while requesting a resource.
|
||
|
||
### Event: 'dom-ready'
|
||
|
||
* `event` Event
|
||
|
||
Emitted when document in the given frame is loaded.
|
||
|
||
### Event: 'page-favicon-updated'
|
||
|
||
* `event` Event
|
||
* `favicons` Array - Array of Urls
|
||
|
||
Emitted when page receives favicon urls.
|
||
|
||
### Event: 'new-window'
|
||
|
||
* `event` Event
|
||
* `url` String
|
||
* `frameName` String
|
||
* `disposition` String - Can be `default`, `foreground-tab`, `background-tab`,
|
||
`new-window` and `other`
|
||
|
||
Emitted when the page requested to open a new window for `url`. It could be
|
||
requested by `window.open` or an external link like `<a target='_blank'>`.
|
||
|
||
By default a new `BrowserWindow` will be created for the `url`.
|
||
|
||
Calling `event.preventDefault()` can prevent creating new windows.
|
||
|
||
### Event: 'will-navigate'
|
||
|
||
* `event` Event
|
||
* `url` String
|
||
|
||
Emitted when user or the page wants to start an navigation, it can happen when
|
||
`window.location` object is changed or user clicks a link in the page.
|
||
|
||
This event will not emit when the navigation is started programmatically with APIs
|
||
like `WebContents.loadUrl` and `WebContents.back`.
|
||
|
||
Calling `event.preventDefault()` can prevent the navigation.
|
||
|
||
### Event: 'crashed'
|
||
|
||
Emitted when the renderer process is crashed.
|
||
|
||
### Event: 'gpu-crashed'
|
||
|
||
Emitted when the gpu process is crashed.
|
||
|
||
### Event: 'plugin-crashed'
|
||
|
||
* `event` Event
|
||
* `name` String
|
||
* `version` String
|
||
|
||
Emitted when a plugin process is crashed.
|
||
|
||
### Event: 'destroyed'
|
||
|
||
Emitted when the WebContents is destroyed.
|
||
|
||
### WebContents.loadUrl(url, [options])
|
||
|
||
* `url` URL
|
||
* `options` URL
|
||
* `httpReferrer` String - A HTTP Referer url
|
||
* `userAgent` String - A user agent originating the request
|
||
|
||
Loads the `url` in the window, the `url` must contains the protocol prefix,
|
||
e.g. the `http://` or `file://`.
|
||
|
||
### WebContents.getUrl()
|
||
|
||
Returns URL of current web page.
|
||
|
||
### WebContents.getTitle()
|
||
|
||
Returns the title of web page.
|
||
|
||
### WebContents.isLoading()
|
||
|
||
Returns whether web page is still loading resources.
|
||
|
||
### WebContents.isWaitingForResponse()
|
||
|
||
Returns whether web page is waiting for a first-response for the main resource
|
||
of the page.
|
||
|
||
### WebContents.stop()
|
||
|
||
Stops any pending navigation.
|
||
|
||
### WebContents.reload()
|
||
|
||
Reloads current page.
|
||
|
||
### WebContents.reloadIgnoringCache()
|
||
|
||
Reloads current page and ignores cache.
|
||
|
||
### WebContents.canGoBack()
|
||
|
||
Returns whether the web page can go back.
|
||
|
||
### WebContents.canGoForward()
|
||
|
||
Returns whether the web page can go forward.
|
||
|
||
### WebContents.canGoToOffset(offset)
|
||
|
||
* `offset` Integer
|
||
|
||
Returns whether the web page can go to `offset`.
|
||
|
||
### WebContents.clearHistory()
|
||
|
||
Clears the navigation history.
|
||
|
||
### WebContents.goBack()
|
||
|
||
Makes the web page go back.
|
||
|
||
### WebContents.goForward()
|
||
|
||
Makes the web page go forward.
|
||
|
||
### WebContents.goToIndex(index)
|
||
|
||
* `index` Integer
|
||
|
||
Navigates to the specified absolute index.
|
||
|
||
### WebContents.goToOffset(offset)
|
||
|
||
* `offset` Integer
|
||
|
||
Navigates to the specified offset from the "current entry".
|
||
|
||
### WebContents.isCrashed()
|
||
|
||
Whether the renderer process has crashed.
|
||
|
||
### WebContents.setUserAgent(userAgent)
|
||
|
||
* `userAgent` String
|
||
|
||
Overrides the user agent for this page.
|
||
|
||
### WebContents.insertCSS(css)
|
||
|
||
* `css` String
|
||
|
||
Injects CSS into this page.
|
||
|
||
### WebContents.executeJavaScript(code)
|
||
|
||
* `code` String
|
||
|
||
Evaluates `code` in page.
|
||
|
||
### WebContents.setAudioMuted(muted)
|
||
|
||
+ `muted` Boolean
|
||
|
||
Set the page muted.
|
||
|
||
### WebContents.isAudioMuted()
|
||
|
||
Returns whether this page has been muted.
|
||
|
||
### WebContents.undo()
|
||
|
||
Executes editing command `undo` in page.
|
||
|
||
### WebContents.redo()
|
||
|
||
Executes editing command `redo` in page.
|
||
|
||
### WebContents.cut()
|
||
|
||
Executes editing command `cut` in page.
|
||
|
||
### WebContents.copy()
|
||
|
||
Executes editing command `copy` in page.
|
||
|
||
### WebContents.paste()
|
||
|
||
Executes editing command `paste` in page.
|
||
|
||
### WebContents.pasteAndMatchStyle()
|
||
|
||
Executes editing command `pasteAndMatchStyle` in page.
|
||
|
||
### WebContents.delete()
|
||
|
||
Executes editing command `delete` in page.
|
||
|
||
### WebContents.selectAll()
|
||
|
||
Executes editing command `selectAll` in page.
|
||
|
||
### WebContents.unselect()
|
||
|
||
Executes editing command `unselect` in page.
|
||
|
||
### WebContents.replace(text)
|
||
|
||
* `text` String
|
||
|
||
Executes editing command `replace` in page.
|
||
|
||
### WebContents.replaceMisspelling(text)
|
||
|
||
* `text` String
|
||
|
||
Executes editing command `replaceMisspelling` in page.
|
||
|
||
### WebContents.hasServiceWorker(callback)
|
||
|
||
* `callback` Function
|
||
|
||
Checks if any serviceworker is registered and returns boolean as
|
||
response to `callback`.
|
||
|
||
### WebContents.unregisterServiceWorker(callback)
|
||
|
||
* `callback` Function
|
||
|
||
Unregisters any serviceworker if present and returns boolean as
|
||
response to `callback` when the JS promise is fullfilled or false
|
||
when the JS promise is rejected.
|
||
|
||
### WebContents.print([options])
|
||
|
||
* `options` Object
|
||
* `silent` Boolean - Don't ask user for print settings, defaults to `false`
|
||
* `printBackground` Boolean - Also prints the background color and image of
|
||
the web page, defaults to `false`.
|
||
|
||
Prints window's web page. When `silent` is set to `false`, Electron will pick
|
||
up system's default printer and default settings for printing.
|
||
|
||
Calling `window.print()` in web page is equivalent to call
|
||
`WebContents.print({silent: false, printBackground: false})`.
|
||
|
||
**Note:** On Windows, the print API relies on `pdf.dll`. If your application
|
||
doesn't need print feature, you can safely remove `pdf.dll` in saving binary
|
||
size.
|
||
|
||
### WebContents.printToPDF(options, callback)
|
||
|
||
* `options` Object
|
||
* `marginsType` Integer - Specify the type of margins to use
|
||
* 0 - default
|
||
* 1 - none
|
||
* 2 - minimum
|
||
* `printBackground` Boolean - Whether to print CSS backgrounds.
|
||
* `printSelectionOnly` Boolean - Whether to print selection only.
|
||
* `landscape` Boolean - `true` for landscape, `false` for portrait.
|
||
|
||
* `callback` Function - `function(error, data) {}`
|
||
* `error` Error
|
||
* `data` Buffer - PDF file content
|
||
|
||
Prints windows' web page as PDF with Chromium's preview printing custom
|
||
settings.
|
||
|
||
By default, an empty `options` will be regarded as
|
||
`{marginsType:0, printBackgrounds:false, printSelectionOnly:false,
|
||
landscape:false}`.
|
||
|
||
```javascript
|
||
var BrowserWindow = require('browser-window');
|
||
var fs = require('fs');
|
||
|
||
var win = new BrowserWindow({width: 800, height: 600});
|
||
win.loadUrl("http://github.com");
|
||
|
||
win.webContents.on("did-finish-load", function() {
|
||
// Use default printing options
|
||
win.webContents.printToPDF({}, function(error, data) {
|
||
if (error) throw error;
|
||
fs.writeFile(dist, data, function(error) {
|
||
if (err)
|
||
alert('write pdf file error', error);
|
||
})
|
||
})
|
||
});
|
||
```
|
||
|
||
### WebContents.send(channel[, args...])
|
||
|
||
* `channel` String
|
||
|
||
Send `args..` to the web page via `channel` in asynchronous message, the web
|
||
page can handle it by listening to the `channel` event of `ipc` module.
|
||
|
||
An example of sending messages from the main process to the renderer process:
|
||
|
||
```javascript
|
||
// On the main process.
|
||
var window = null;
|
||
app.on('ready', function() {
|
||
window = new BrowserWindow({width: 800, height: 600});
|
||
window.loadUrl('file://' + __dirname + '/index.html');
|
||
window.webContents.on('did-finish-load', function() {
|
||
window.webContents.send('ping', 'whoooooooh!');
|
||
});
|
||
});
|
||
```
|
||
|
||
```html
|
||
// index.html
|
||
<html>
|
||
<body>
|
||
<script>
|
||
require('ipc').on('ping', function(message) {
|
||
console.log(message); // Prints "whoooooooh!"
|
||
});
|
||
</script>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
**Note:**
|
||
|
||
1. The IPC message handler in web pages do not have a `event` parameter, which
|
||
is different from the handlers on the main process.
|
||
2. There is no way to send synchronous messages from the main process to a
|
||
renderer process, because it would be very easy to cause dead locks.
|
||
|
||
## Class: WebContents.session.cookies
|
||
|
||
The `cookies` gives you ability to query and modify cookies, an example is:
|
||
|
||
```javascipt
|
||
var BrowserWindow = require('browser-window');
|
||
|
||
var win = new BrowserWindow({ width: 800, height: 600 });
|
||
|
||
win.loadUrl('https://github.com');
|
||
|
||
win.webContents.on('did-finish-load', function() {
|
||
// Query all cookies.
|
||
win.webContents.session.cookies.get({}, function(error, cookies) {
|
||
if (error) throw error;
|
||
console.log(cookies);
|
||
});
|
||
|
||
// Query all cookies that are associated with a specific url.
|
||
win.webContents.session.cookies.get({ url : "http://www.github.com" },
|
||
function(error, cookies) {
|
||
if (error) throw error;
|
||
console.log(cookies);
|
||
});
|
||
|
||
// Set a cookie with the given cookie data;
|
||
// may overwrite equivalent cookies if they exist.
|
||
win.webContents.session.cookies.set(
|
||
{ url : "http://www.github.com", name : "dummy_name", value : "dummy"},
|
||
function(error, cookies) {
|
||
if (error) throw error;
|
||
console.log(cookies);
|
||
});
|
||
});
|
||
```
|
||
|
||
### WebContents.session.cookies.get(details, callback)
|
||
|
||
* `details` Object
|
||
* `url` String - Retrieves cookies which are associated with `url`.
|
||
Empty imples retrieving cookies of all urls.
|
||
* `name` String - Filters cookies by name
|
||
* `domain` String - Retrieves cookies whose domains match or are subdomains of `domains`
|
||
* `path` String - Retrieves cookies whose path matches `path`
|
||
* `secure` Boolean - Filters cookies by their Secure property
|
||
* `session` Boolean - Filters out session or persistent cookies.
|
||
* `callback` Function - function(error, cookies)
|
||
* `error` Error
|
||
* `cookies` Array - array of `cookie` objects.
|
||
* `cookie` - Object
|
||
* `name` String - The name of the cookie
|
||
* `value` String - The value of the cookie
|
||
* `domain` String - The domain of the cookie
|
||
* `host_only` String - Whether the cookie is a host-only cookie
|
||
* `path` String - The path of the cookie
|
||
* `secure` Boolean - Whether the cookie is marked as Secure (typically HTTPS)
|
||
* `http_only` Boolean - Whether the cookie is marked as HttpOnly
|
||
* `session` Boolean - Whether the cookie is a session cookie or a persistent
|
||
* cookie with an expiration date.
|
||
* `expirationDate` Double - (Option) The expiration date of the cookie as
|
||
the number of seconds since the UNIX epoch. Not provided for session cookies.
|
||
|
||
|
||
### WebContents.session.cookies.set(details, callback)
|
||
|
||
* `details` Object
|
||
* `url` String - Retrieves cookies which are associated with `url`
|
||
* `name` String - The name of the cookie. Empty by default if omitted.
|
||
* `value` String - The value of the cookie. Empty by default if omitted.
|
||
* `domain` String - The domain of the cookie. Empty by default if omitted.
|
||
* `path` String - The path of the cookie. Empty by default if omitted.
|
||
* `secure` Boolean - Whether the cookie should be marked as Secure. Defaults to false.
|
||
* `session` Boolean - Whether the cookie should be marked as HttpOnly. Defaults to false.
|
||
* `expirationDate` Double - The expiration date of the cookie as the number of
|
||
seconds since the UNIX epoch. If omitted, the cookie becomes a session cookie.
|
||
|
||
* `callback` Function - function(error)
|
||
* `error` Error
|
||
|
||
### WebContents.session.cookies.remove(details, callback)
|
||
|
||
* `details` Object
|
||
* `url` String - The URL associated with the cookie
|
||
* `name` String - The name of cookie to remove
|
||
* `callback` Function - function(error)
|
||
* `error` Error
|