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📱 Embed additional web content into Capacitor apps.

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📱 Capacitor BrowserView

➡️ Embed additional web content into Capacitor apps.

Warning

WIP - Work in Progress

Table of contents

Install

Capacitor v5 or newer is required. This project isn't compatible with lower versions of Capacitor.

npm install https://github.com/hampoelz/capacitor-browserview/releases/download/v1.0.0-beta.3/capacitor-browserview.tgz
npx cap sync

Supported Platforms

Getting Started

Minimal example

To embed an additional web page to the Capacitor app, first a new BrowserView needs to be created. This is done by importing the BrowserView class from the Capacitor-BrowserView plugin and calling the create method. After that, just set its bounds and load a website.

import { BrowserView } from 'capacitor-browserview';

// Creates a new BrowserView, sets its bounds and loads a website.
const myView = await BrowserView.create();
myView.setBounds({ bounds: { x: 0, y: 0, width: 300, height: 600 } });
myView.loadUrl({ url: "https://capacitorjs.com/" });

At this point, the BrowserView should be created within the application and the website should start loading. Using the returned reference to the BrowserView, it is easy to interact with it, as shown here in a few examples:

// Reloads the current web page.
myView.reload();

// Gets the user-agent for this web page.
const { userAgent } = await myView.getUserAgent();
console.log("The following UserAgent is used for this web page: " + userAgent);

// Handles finished page load.
myView.addListener('did-finish-load', () => {
    console.log("Congratulations! The web page loaded successfully.");
});

// Handles title changes of the web page.
myView.addListener('page-title-updated', event => {
    console.log(`The web page has changed its title to '${event.title}'.`);
});

// Removes the BrowserView from the app, and cleans up references.
myView.destroy();

Inter-Process Communication

This plugin includes a bridge between the Capacitor layer and the loaded web page in the BrowserView(s). However, this feature is disabled by default. It can be enabled either globally via the plugin configuration or for each BrowserView individually during its creation.

If the bridge feature is enabled, the global object window.CapacitorBrowserView is available on web pages within the corresponding BrowserView.

To use the bridge, the website first needs to be modified so that it is capable of receiving and returning messages. For example, add the following sample code to the web page:

// Listens to "msg-from-capacitor" from the Capacitor layer.
CapacitorBrowserView.addListener("msg-from-capacitor", message => {
    console.log('Message from Capacitor-App: ' + message);

    // Sends a message back to the Capacitor layer.
    CapacitorBrowserView.send("msg-from-web", `Replying to the message '${message}'.`, "And optionally add further args");
});

After that, a new BrowserView with an enabled bridge needs be set up. In addition, the Capacitor app should also be able to receive messages and send a message to the website. Note that the web page must be loaded entirely before it can receive messages. This could look something like this:

import { BrowserView } from 'capacitor-browserview';

const myView = await BrowserView.create({ enableBridge: true });
myView.setBounds({ bounds: { x: 0, y: 0, width: 300, height: 600 } });

// Listens to "msg-from-web" from the web page.
myView.addMessageListener('msg-from-web', data => {
    console.log("Message from web page: ", data.args);
});

// Waits for the web page to finish loading.
myView.addListener('did-finish-load', () => {

    // Sends a message to the web page.
    myView.sendMessage({
        eventName: "msg-from-capacitor",
        args: [ "Hello from Capacitor!" ]
    });

});

myView.loadUrl({ url: "https://webpage.dev/" });

A full API documentation can be found in the API - Bridge module section.

Configuration

The following configurations are applied globally to all BrowserViews. However, most of them can be overridden individually when a BrowserView is created or changed later via methods.

These config values are available:

Prop Type Description Default Since
url string Default external URL loaded in BrowserViews. 1.0.0
allowMultipleWindows boolean Open links that request a new tab or window (e.g. by window.open(), a link with target="_blank", shift+clicking on a link, or submitting a form with <form target="_blank">.) in the external browser instead of the BrowserViews. true 1.0.0
allowNavigation string[] Set regular expressions to which the BrowserViews can navigate additional. By default, all external URLs are opened in the external browser (not the BrowserView). [] 1.0.0
enableBridge boolean Enable a bridge between the Capacitor layer and the loaded web page. false 1.0.0
overrideUserAgent string Default user-agent for BrowserViews. 1.0.0
appendUserAgent string String to append to the original user-agent for BrowserViews. This is disregarded if overrideUserAgent is used. 1.0.0
backgroundColor Color Default background color for BrowserViews. 1.0.0
androidOverrideUserAgent string Default user-agent for BrowserViews on Android. Overrides global overrideUserAgent option. 1.0.0
androidAppendUserAgent string String to append to the original user-agent for BrowserViews for Android. Overrides global appendUserAgent option. This is disregarded if overrideUserAgent is used. 1.0.0
androidBackgroundColor Color Default background color for BrowserViews for Android. Overrides global backgroundColor option. 1.0.0
androidAllowMixedContent boolean Enable mixed content in the BrowserViews for Android. Mixed content is disabled by default for security. During development, this option may need to be enabled to allow the BrowserViews to load files from different schemes. This is not intended for use in production. false 1.0.0
electronOverrideUserAgent string Default user-agent for BrowserViews on Electron. Overrides global overrideUserAgent option. 1.0.0
electronAppendUserAgent string String to append to the original user-agent for BrowserViews for Electron. Overrides global appendUserAgent option. This is disregarded if overrideUserAgent is used. 1.0.0
electronBackgroundColor Color Default background color for BrowserViews for Electron. Overrides global backgroundColor option. 1.0.0
electronAllowMixedContent boolean Enable mixed content in the BrowserViews for Electron. Mixed content is disabled by default for security. During development, this option may need to be enabled to allow the BrowserViews to load files from different schemes. This is not intended for use in production. false 1.0.0

Examples

In capacitor.config.json:

{
  "plugins": {
    "CapacitorBrowserView": {
      "url": "https://capacitorjs.com/",
      "allowMultipleWindows": false,
      "allowNavigation": [ "capacitorjs\.com", "ionic\.io\/blog\/.*capacitor.*" ],
      "enableBridge": true,
      "overrideUserAgent": "Mozilla/5.0 (CapacitorJS) CapacitorApp/1.0",
      "appendUserAgent": "CapacitorApp/1.0",
      "backgroundColor": "#ffffff",
      "androidOverrideUserAgent": "Mozilla/5.0 (Android) CapacitorApp/1.0",
      "androidAppendUserAgent": "CapacitorApp/1.0 (Android)",
      "androidBackgroundColor": "#ffffff",
      "androidAllowMixedContent": false,
      "electronOverrideUserAgent": "Mozilla/5.0 (Electron) CapacitorApp/1.0",
      "electronAppendUserAgent": "CapacitorApp/1.0 (Electron)",
      "electronBackgroundColor": "#ffffff",
      "electronAllowMixedContent": false
    }
  }
}

In capacitor.config.ts:

/// <reference types="capacitor-browserview" />

import { CapacitorConfig } from '@capacitor/cli';

const config: CapacitorConfig = {
  plugins: {
    CapacitorBrowserView: {
      url: "https://capacitorjs.com/",
      allowMultipleWindows: false,
      allowNavigation: [ "capacitorjs\.com", "ionic\.io\/blog\/.*capacitor.*" ],
      enableBridge: true,
      overrideUserAgent: "Mozilla/5.0 (CapacitorJS) CapacitorApp/1.0",
      appendUserAgent: "CapacitorApp/1.0",
      backgroundColor: "#ffffff",
      androidOverrideUserAgent: "Mozilla/5.0 (Android) CapacitorApp/1.0",
      androidAppendUserAgent: "CapacitorApp/1.0 (Android)",
      androidBackgroundColor: "#ffffff",
      androidAllowMixedContent: false,
      electronOverrideUserAgent: "Mozilla/5.0 (Electron) CapacitorApp/1.0",
      electronAppendUserAgent: "CapacitorApp/1.0 (Electron)",
      electronBackgroundColor: "#ffffff",
      electronAllowMixedContent: false,
    },
  },
};

export default config;

API - Bridge module

This plugin includes a bridge between the Capacitor layer and the loaded web page in the BrowserView(s). However, this feature is disabled by default. It can be enabled either globally via the plugin configuration or for each BrowserView individually during its creation.

If the bridge feature is enabled, the global object window.CapacitorBrowserView is available on web pages within the corresponding BrowserView.

The window.CapacitorBrowserView object provides an API to communicate between the Capacitor layer and the web pages.

It has the following methods to listen for events and send messages:

CapacitorBrowserView.send(...)

send: (eventName: string, ...args: any[]) => void

Sends a message to the Capacitor layer via eventName, along with arguments. Arguments will be serialized with JSON.

Param Type Description Since
eventName string The name of the event being send to. 1.0.0
args any[] The Array of arguments to send. 1.0.0

Since: 1.0.0

CapacitorBrowserView.addListener(string, ...)

addListener: (eventName: string, callback: (...args: any[]) => void) => void

Listens to eventName and calls callback(args...) when a new message arrives from the Capacitor layer.

Param Type
eventName string
callback (args: any[]) => void 
callback: (args: any[]) => void
Param Type Description Since
args any[] The received array of arguments. 1.0.0

Since: 1.0.0

API - Capacitor layer

A BrowserView can be used to embed additional web content into the Capacitor-App. It is like a child window, except that it is positioned relative to its owning window.

It has the following methods:

create(...)

create(options?: CreateOptions) => Promise<BrowserView>

Creates a new BrowserView with properties as set by the options.

Param Type
options CreateOptions

Returns: Promise

Since: 1.0.0

destroy()

destroy() => Promise<void>

Removes the BrowserView from the app and destroys its internal state. No other methods may be called on this BrowserView after destroy.

Since: 1.0.0

setBounds(...)

setBounds(args: BoundsPayloadData) => Promise<void>

Resizes and moves the view to the supplied bounds relative to the window.

Param Type
args BoundsPayloadData

Since: 1.0.0

getBounds()

getBounds() => Promise<BoundsPayloadData>

Gets the bounds of the view relative to the window.

Returns: Promise<BoundsPayloadData>

Since: 1.0.0

setBackgroundColor(...)

setBackgroundColor(args: ColorPayloadData) => Promise<void>

Sets the background color for this view.

Param Type
args ColorPayloadData

Since: 1.0.0

loadUrl(...)

loadUrl(args: UrlPayloadData) => Promise<void>

Loads the given url in the view. The url must contain the protocol prefix, e.g. the https://.

Param Type
args UrlPayloadData

Since: 1.0.0

getUrl()

getUrl() => Promise<UrlPayloadData>

Gets the url of the current page. This is not always the same as the url passed to BrowserView.addListener('will-navigate', callback) because although the load for that url has begun, the current page may not have changed.

Returns: Promise<UrlPayloadData>

Since: 1.0.0

getTitle()

getTitle() => Promise<TitlePayloadData>

Gets the title of the current page. This is the title of the current page until BrowserView.addListener('page-title-updated', callback) is called.

Returns: Promise<TitlePayloadData>

Since: 1.0.0

stop()

stop() => Promise<void>

Stops any pending navigation.

Since: 1.0.0

reload()

reload() => Promise<void>

Reloads the current web page.

Since: 1.0.0

canGoBack()

canGoBack() => Promise<CanGoBackPayloadData>

Gets whether the browser can go back to previous web page.

Returns: Promise<CanGoBackPayloadData>

Since: 1.0.0

canGoForward()

canGoForward() => Promise<CanGoForwardPayloadData>

Gets whether the browser can go forward to next web page.

Returns: Promise<CanGoForwardPayloadData>

Since: 1.0.0

clearHistory()

clearHistory() => Promise<void>

Clears the internal back/forward navigation history list.

Since: 1.0.0

goBack()

goBack() => Promise<void>

Makes the browser go back a web page.

Since: 1.0.0

goForward()

goForward() => Promise<void>

Makes the browser go forward a web page.

Since: 1.0.0

setUserAgent(...)

setUserAgent(args: UserAgentPayloadData) => Promise<void>

Overrides the user-agent string for this web page. If the string empty, the system default value will be used.

Note: Starting from Android KitKat (4.4), changing the user-agent while loading a web page causes the BrowserView to initiate loading once again.

Param Type
args UserAgentPayloadData

Since: 1.0.0

appendUserAgent(...)

appendUserAgent(args: UserAgentPayloadData) => Promise<void>

Appends the specified user-agent to the current user-agent string for this web page.

Note: Starting from Android KitKat (4.4), changing the user-agent while loading a web page causes the BrowserView to initiate loading once again.

Param Type
args UserAgentPayloadData

Since: 1.0.0

getUserAgent()

getUserAgent() => Promise<UserAgentPayloadData>

Gets the user-agent string for this web page.

Returns: Promise<UserAgentPayloadData>

Since: 1.0.0

executeJavaScript(...)

executeJavaScript(args: CodeExecutePayloadData) => Promise<CodeExecuteResultData>

Asynchronously evaluates JavaScript in the context of the currently displayed page. Returns a promise that resolves with the result of the executed code.

Param Type
args CodeExecutePayloadData

Returns: Promise<CodeExecuteResultData>

Since: 1.0.0

setAllowMultipleWindows(...)

setAllowMultipleWindows(args: AllowMultipleWindowsPayloadData) => Promise<void>

Sets whether the BrowserView supports multiple windows. If set to true, links that request a new tab or window (e.g. by window.open(), a link with target="_blank", shift+clicking on a link, or submitting a form with <form target="_blank">.) open in the external browser instead of the BrowserView.

Param Type
args AllowMultipleWindowsPayloadData

Since: 1.0.0

getAllowMultipleWindows()

getAllowMultipleWindows() => Promise<AllowMultipleWindowsPayloadData>

Gets whether the BrowserView supports multiple windows.

Returns: Promise<AllowMultipleWindowsPayloadData>

Since: 1.0.0

setAllowedNavigation(...)

setAllowedNavigation(args: AllowedNavigationPayloadData) => Promise<void>

Sets regular expressions to which the BrowserView can navigate additional.

By default, all external URLs are opened in the external browser (not the BrowserView).

Param Type
args AllowedNavigationPayloadData

Since: 1.0.0

getAllowedNavigation()

getAllowedNavigation() => Promise<AllowedNavigationPayloadData>

Gets the list of regular expressions that the BrowserView can additional navigate to.

Returns: Promise<AllowedNavigationPayloadData>

Since: 1.0.0

sendMessage(...)

sendMessage(args: MessageChannelPayloadData) => Promise<void>

Sends a message to the current page in the BrowserView.

Note: This method is only available if the bridge was enabled during the BrowserView creation or globally via the plugin configuration.

Param Type
args MessageChannelPayloadData

Since: 1.0.0

addListener('new-window', ...)

addListener(eventName: 'new-window', listenerFunc: BrowserViewListenerCallback<NavigationPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when the current page request a new tab or window, e.g. by window.open(), a link with target="_blank", shift+clicking on a link, or submitting a form with <form target="_blank">.

Whether links should be opened in the external browser or in the BrowserView itself can be set with the method BrowserView.setAllowMultipleWindows() or with the global option allowMultipleWindows.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'new-window'
listenerFunc BrowserViewListenerCallback<NavigationPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('close-window', ...)

addListener(eventName: 'close-window', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the browser has stopped any loading in this window and has removed any cross-scripting ability in JavaScript.

The application's implementation of this callback should remove the specific BrowserView if this is not already done and ensure that any URL or security indicator displayed is updated so that the user can tell that the page they were interacting with has been closed.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'close-window'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('page-favicon-updated', ...)

addListener(eventName: 'page-favicon-updated', listenerFunc: BrowserViewListenerCallback<IconPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when the current page receives a new favicon.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'page-favicon-updated'
listenerFunc BrowserViewListenerCallback<IconPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('page-title-updated', ...)

addListener(eventName: 'page-title-updated', listenerFunc: BrowserViewListenerCallback<TitlePayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when the document title changes.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'page-title-updated'
listenerFunc BrowserViewListenerCallback<TitlePayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('enter-html-full-screen', ...)

addListener(eventName: 'enter-html-full-screen', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the window enters a full-screen state triggered by HTML API.

Note: On Android this event requires API level 7 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'enter-html-full-screen'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('leave-html-full-screen', ...)

addListener(eventName: 'leave-html-full-screen', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the window leaves a full-screen state triggered by HTML API.

Note: On Android this event requires API level 7 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'leave-html-full-screen'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('will-navigate', ...)

addListener(eventName: 'will-navigate', listenerFunc: BrowserViewListenerCallback<NavigationPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when a user or the page wants to start navigation on the main frame. It can happen when the window.location object is changed or a user clicks a link in the page.

This event will not emit when the navigation is started programmatically with APIs like BrowserView.loadUrl() and BrowserView.goBack() or for POST requests.

It is also not emitted for in-page navigations, such as clicking anchor links or updating the window.location.hash.

On Android it may be called for subframes too.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'will-navigate'
listenerFunc BrowserViewListenerCallback<NavigationPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('did-start-loading', ...)

addListener(eventName: 'did-start-loading', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the page has started loading. Corresponds to the points in time when the spinner of the tab started spinning.

On Android, this callback is called only once for each main frame load so a page with iframes or framesets will call this only one time for the main frame. This also means that this callback will not be called when the contents of an embedded frame changes.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'did-start-loading'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('did-finish-load', ...)

addListener(eventName: 'did-finish-load', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the page has finished loading, i.e. the spinner of the tab has stopped spinning. This does not guarantee that the next frame drawn by BrowserView will reflect the state of the DOM at this point.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'did-finish-load'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('did-fail-load', ...)

addListener(eventName: 'did-fail-load', listenerFunc: BrowserViewListenerCallback<ErrorPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when the page failed to load. These errors usually indicate inability to connect to the server.

On Android at API level 23 or higher, this event is fired for any resource (iframe, image, etc.), not just for the main page.

The full list of error codes and their meaning is available here.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'did-fail-load'
listenerFunc BrowserViewListenerCallback<ErrorPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('dom-ready', ...)

addListener(eventName: 'dom-ready', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the document in the top-level frame is loaded.

This callback is called when the body of the HTTP response has started loading, is reflected in the DOM, and will be visible in subsequent draws. This callback occurs early in the document loading process, and as such it should be expected that linked resources (for example, CSS and images) may not be available.

Note: On Android this event requires API level 23 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'dom-ready'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('http-error', ...)

addListener(eventName: 'http-error', listenerFunc: BrowserViewListenerCallback<ResponsePayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when an HTTP error has been received from the server while loading a resource. HTTP errors have status codes >= 400.

This callback will be called for any resource (iframe, image, etc.), not just for the main page.

Note: On Android this event requires API level 23 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'http-error'
listenerFunc BrowserViewListenerCallback<ResponsePayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('render-process-gone', ...)

addListener(eventName: 'render-process-gone', listenerFunc: BrowserViewListenerCallback<RenderProcessGonePayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc(data) when the renderer process unexpectedly disappears. This is normally because it was crashed or killed.

Multiple BrowserView instances may be associated with a single render process. This callback will be called for each BrowserView that was affected.

The application's implementation of this callback should only attempt to clean up the specific BrowserView, and should not assume that other BrowserView instances are affected.

The BrowserView can't be used, and should be removed from the application.

To cause an render process crash for test purpose, the application can call BrowserView.loadUrl("chrome://crash") on the BrowserView. Note that multiple BrowserView instances may be affected if they share a render process, not just the specific BrowserView which loaded chrome://crash.

Note: On Android this event requires API level 26 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'render-process-gone'
listenerFunc BrowserViewListenerCallback<RenderProcessGonePayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('unresponsive', ...)

addListener(eventName: 'unresponsive', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the renderer of the web page becomes unresponsive as a result of a long running blocking task such as the execution of JavaScript.

If a BrowserView fails to process an input event, or successfully navigate to a new URL within a reasonable time frame, the renderer is considered to be unresponsive, and this callback will be called.

Note: On Android this event requires API level 29 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'unresponsive'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addListener('responsive', ...)

addListener(eventName: 'responsive', listenerFunc: BrowserViewListenerCallback<EmptyPayloadData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Calls listenerFunc() when the unresponsive renderer of the web page becomes responsive.

Note: On Android this event requires API level 29 or higher to be fired.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName 'responsive'
listenerFunc BrowserViewListenerCallback<EmptyPayloadData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

addMessageListener(...)

addMessageListener(eventName: string, listenerFunc: BrowserViewListenerCallback<MessageChannelCallbackData>) => Promise<PluginListenerHandle> & PluginListenerHandle

Listens to eventName and calls listenerFunc(data) when a new message arrives from the web page.

Note: This listener is only available if the bridge was enabled during the BrowserView creation or globally via the plugin configuration.

Note: When using the Electron platform, PluginListenerHandle.remove() does not work due to limitations. Use removeListener(listenerFunc) instead.

Param Type
eventName string
listenerFunc BrowserViewListenerCallback<MessageChannelCallbackData>

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0

removeListener(...)

removeListener(listenerHandle: PluginListenerHandle) => Promise<void>

Removes the specified listenerHandle from the listener array for the event it refers to.

Param Type
listenerHandle PluginListenerHandle

Since: 1.0.0

removeAllListeners(...)

removeAllListeners(eventName?: string) => Promise<void>

Removes all listeners, or those of the specified eventName, of the BrowserView.

Param Type
eventName string

Since: 1.0.0

Interfaces

CreateOptions

An interface containing the options used when creating a BrowserView. They override the global plugin configurations for this specific BrowserView.

Prop Type Description Default Since
url string Initial URL that is loaded immediately after the BrowserView has been created. 1.0.0
allowMultipleWindows boolean Open links that request a new tab or window (e.g. by window.open(), a link with target="_blank", shift+clicking on a link, or submitting a form with <form target="_blank">.) in the external browser instead of the BrowserViews. true 1.0.0
enableBridge boolean Enable a bridge between the Capacitor layer and the loaded web page. false 1.0.0
overrideUserAgent string Default user-agent. 1.0.0
appendUserAgent string String to append to the original user-agent. This is disregarded if overrideUserAgent is used. 1.0.0
backgroundColor Color Default background color. 1.0.0

BoundsPayloadData

Prop Type Since
bounds Rectangle 1.0.0

Rectangle

An interface that holds two integer coordinates and two integer dimensions for a rectangle. The coordinates are specified in terms of the upper-left corner of the rectangle. The width and height are the dimensions of the rectangle. These fields can be accessed directly.

Prop Type Description Since
x number The x coordinate of the origin of the rectangle (must be an integer). 1.0.0
y number The y coordinate of the origin of the rectangle (must be an integer). 1.0.0
width number The width of the rectangle (must be an integer). 1.0.0
height number The height of the rectangle (must be an integer). 1.0.0

ColorPayloadData

Prop Type Since
color Color 1.0.0

UrlPayloadData

Prop Type Description Since
url string The URL of a web page. 1.0.0

TitlePayloadData

Prop Type Description Since
title string The title of a web page. 1.0.0

CanGoBackPayloadData

Prop Type Description Since
canGoBack boolean Whether the browser can go back to previous web page. 1.0.0

CanGoForwardPayloadData

Prop Type Description Since
canGoForward boolean Whether the browser can go forward to next web page. 1.0.0

UserAgentPayloadData

Prop Type Description Since
userAgent string The BrowserView's user-agent string. 1.0.0

CodeExecuteResultData

Prop Type Description Since
result any The result of the execution (if any). 1.0.0

CodeExecutePayloadData

Prop Type Description Since
code string The JavaScript to execute. 1.0.0

AllowMultipleWindowsPayloadData

Prop Type Description Since
allowMultipleWindows boolean Whether the BrowserView supports multiple windows. If set to true, links that request a new tab or window (e.g. by window.open(), a link with target="_blank", shift+clicking on a link, or submitting a form with <form target="_blank">.) open in the external browser instead of the BrowserView. 1.0.0

AllowedNavigationPayloadData

Prop Type Description Since
allowedNavigation string[] The list of regular expressions that the BrowserView can additional navigate to. 1.0.0

MessageChannelPayloadData

The payload data to send a message to the web page via eventName, along with arguments. Arguments will be serialized with JSON.

Prop Type Description Since
eventName string The name of the event being send to. 1.0.0
args any[] The array of arguments to send. 1.0.0

PluginListenerHandle

Prop Type
remove () => Promise<void>

NavigationPayloadData

Prop Type Description Since
url string The URL of a web page. 1.0.0
isExternal boolean Whether the URL is opened in the external browser or in the BrowserView.

EmptyPayloadData

An empty interface that represents no data.

IconPayloadData

Prop Type Description Since
icon string The favicon of a web page as base64 encoded string. 1.0.0

ErrorPayloadData

Prop Type Description Since
error WebResourceError Information about the error occurred. 1.0.0

WebResourceError

An interface that encapsulates information about the error that occurred during loading of web resources.

Prop Type Description Since
errorCode number The error code of the error. The full list of error codes and their meaning is available here. 1.0.0
errorDescription string A string describing the error. Descriptions are localized, and thus can be used for communicating the problem to the user. 1.0.0
validatedURL string The URL that failed to load. 1.0.0

ResponsePayloadData

Prop Type Description Since
url string The URL that failed to load. 1.0.0
errorResponse WebResourceResponse Information about the error occurred. 1.0.0

WebResourceResponse

An interface that encapsulates a resource response about the error that occurred.

Prop Type Description Since
httpResponseCode number The status code of the error response. 1.0.0
httpStatusText string The description of the status code of the error response. 1.0.0

RenderProcessGonePayloadData

Prop Type Description Since
details RenderProcessGoneDetail The reason why the renderer process exited. 1.0.0

RenderProcessGoneDetail

An interface that encapsulates information about why the render process exited. The application may use this to decide how to handle the situation.

Prop Type Description Since
crashed boolean Indicates whether the render process was observed to crash, or whether it was killed by the system. If the render process was killed, this is most likely caused by the system being low on memory. 1.0.0

MessageChannelCallbackData

The callback data object when a message from the web page arrives.

Prop Type Description Since
args any[] The received array of arguments. 1.0.0

Type Aliases

Color

A string that represents a color.

Supported formats are #RRGGBB and #AARRGGBB. The following names are also accepted: red, blue, green, black, white, gray, cyan, magenta, yellow, darkgray, lightgrey, aqua, fuchsia, lime, maroon, navy, olive, purple, silver, and teal.

`#${string}` | 'red' | 'blue' | 'green' | 'black' | 'white' | 'gray' | 'cyan' | 'magenta' | 'yellow' | 'darkgray' | 'lightgrey' | 'aqua' | 'fuchsia' | 'lime' | 'maroon' | 'navy' | 'olive' | 'purple' | 'silver' | 'teal'

BrowserViewListenerCallback

The callback function to be called when events are emitted.

(data: T): void

Made with ❤️ by Rene Hampölz

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📱 Embed additional web content into Capacitor apps.

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