Extended WebView for NativeScript which adds 'x-local' scheme for local-files. events between WebView and native-layer, javascript execution, injecting CSS and JS-files.
npm install @nota/nativescript-webview-extExtended WebView for NativeScript which adds "x-local"-custom-scheme for loading local-files, handle events between WebView and NativeScript, JavaScript execution, injecting CSS and JS-files.
Supports Android 19+ and iOS9+.
x-local:// to the webview for loading of resources inside the webview.executeJavaScript(code: string) for executing JavaScript-code and getting result.executePromise(code: string) for calling promises and getting the result.getTitle() returns document.title.NativeScript and WebViewNativeScript to WebViewWebView to NativeScriptcss- and javascript-files.alert, confirm and prompt with WkWebView.Describe your plugin installation steps. Ideally it would be something like:
``bash`
tns plugin add @nota/nativescript-webview-ext
Android SDK 19 is required, update App_Resources/Android/app.gradle:`
android {
defaultConfig {
minSdkVersion 19 // change this line
generatedDensities = []
}
aaptOptions {
additionalParameters "--no-version-vectors"
}
}
`xml
`
Import WebViewExtModule from @nota/nativescript-webview-ext/angular and add it to your NgModule.
This registers the element WebViewExt. Replace the tag with
Import @nota/nativescript-webview-ext/vue in your app entry file (likely app.js or main.js).
This registers the element WebViewExt. Replace the tag with
The custom-scheme handler for x-local:// is only supported by Android and iOS 11+
Custom-scheme support for iOS <11 was removed because of ITMS-90809.
| Property | Value | Description |
| --- | --- | --- |
| readonly supportXLocalScheme | true / false | Is x-local:// supported? True on iOS >= 11 or Android, False on iOS < 11. |loadFinishedEvent
| src | | Load src |
| autoInjectJSBridge | true / false | Should the window.nsWebViewBridge be injected on ? Defaults to true |
| builtInZoomControls | true / false | Android: Is the built-in zoom mechanisms being used |
| cacheMode | default / no_cache / cache_first / cache_only | Android: Set caching mode. |
| databaseStorage | true / false | Android: Enable/Disabled database storage API. Note: It affects all webviews in the process. |
| debugMode | true / false | Android: Enable chrome debugger for webview on Android. Note: Applies to all webviews in App |
| displayZoomControls | true / false | Android: displays on-screen zoom controls when using the built-in zoom mechanisms |
| domStorage | true / false | Android: Enable/Disabled DOM Storage API. E.g localStorage |
| scrollBounce | true / false | iOS: Should the scrollView bounce? Defaults to true. |
| supportZoom | true / false | Android: should the webview support zoom |
| viewPortSize | false / view-port string / ViewPortProperties | Set the viewport metadata on load finished. Note: WkWebView sets initial-scale=1.0 by default. |
| limitsNavigationsToAppBoundDomains | false | iOS: allows to enable Service Workers Note: If set to true, WKAppBoundDomains also should be set in info.plist. |
| Function | Description |
| --- | --- |
| loadUrl(src: string): Promise
| registerLocalResource(resourceName: string, path: string): void; | Map the "x-local://{resourceName}" => "{path}". |
| unregisterLocalResource(resourceName: string): void; | Removes the mapping from "x-local://{resourceName}" => "{path}" |
| getRegisteredLocalResource(resourceName: string): void; | Get the mapping from "x-local://{resourceName}" => "{path}" |
| loadJavaScriptFile(scriptName: string, filepath: string) | Inject a javascript-file into the webview. Should be called after the loadFinishedEvent |loadFinishedEvent
| loadStyleSheetFile(stylesheetName: string, filepath: string, insertBefore: boolean) | Loads a CSS-file into document.head. If before is true, it will be added to the top of document.head otherwise as the last element |
| loadJavaScriptFiles(files: {resourceName: string, filepath: string}[]) | Inject multiple javascript-files into the webview. Should be called after the |loadFinishedEvent
| loadStyleSheetFiles(files: {resourceName: string, filepath: string, insertBefore: boolean}[]) | Loads multiple CSS-files into the document.head. If before is true, it will be added to the top of document.head otherwise as the last element |
| autoLoadJavaScriptFile(resourceName: string, filepath: string) | Register a JavaScript-file to be injected on . If a page is already loaded, the script will be injected into the current page. |loadFinishedEvent
| autoLoadStyleSheetFile(resourceName: string, filepath: string, insertBefore?: boolean) | Register a CSS-file to be injected on . If a page is already loaded, the CSS-file will be injected into the current page. |loadFinishedEvent
| autoExecuteJavaScript(scriptCode: string, name: string) | Execute a script on . The script can be a promise |
| executeJavaScript(scriptCode: string) | Execute JavaScript in the webpage. Note: scriptCode should be ES5 compatible, or it might not work on 'iOS < 11' |
| executePromise(scriptCode: string, timeout: number = 500) | Run a promise inside the webview. Note: Executing scriptCode must return a promise. |
| emitToWebView(eventName: string, data: any) | Emit an event to the webview. Note: data must be stringify'able with JSON.stringify or this throws an exception. |
| getTitle() | Returns a promise with the current document title. |
|
| loadProgress | Android only: Raised during page load to indicate the progress. args is a LoadProgressEventData |
| loadStarted | Raised when a loadStarted event occurs. args is a LoadStartedEventData |
| shouldOverrideUrlLoading | Raised before the webview requests an URL. Can cancelled by setting args.cancel = true in the ShouldOverrideUrlLoadEventData |
| titleChanged | Document title changed |
| webAlert | Raised when window.alert is triggered inside the webview, needed to use custom dialogs for web alerts. args in a WebAlertEventData. args.callback() must be called to indicate alert is closed. |
| webConfirm | Raised when window.confirm is triggered inside the webview, needed to use custom dialogs for web confirm boxes. args in a webConfirmEvent. args.callback(boolean) must be called to indicate confirm box is closed. |
| webConsole | Android only: Raised when a line is added to the web console. args is a WebConsoleEventData. |
| webPrompt | Raised when window.prompt is triggered inside the webview, needed to use custom dialogs for web prompt boxes. args in a webConfirmEvent. args.callback(string | null) must be called to indicate prompt box is closed. |
| Events emitted from the webview | Raised when nsWebViewBridge.emit(...) is called inside the webview. args in an WebViewEventData |$3
Inside the WebView we have the
nsWebViewBridge for sending events between the NativeScript-layer and the WebView.
Note: The bridge will only be available DOMContentLoaded or onload inside the WebView.| Function | Description |
| --- | --- |
| window.nsWebViewBridge.on(eventName: string, cb: (data: any) => void) | Registers handlers for events from the native layer. |
| window.nsWebViewBridge.off(eventName: string, cb?: (data: any) => void) | Unregister handlers for events from the native layer. |
| window.nsWebViewBridge.emit(eventName: string, data: any) | Emits event to NativeScript layer. Will be emitted on the WebViewExt as any other event, data will be a part of the WebViewEventData-object |
#### Waiting for nsWebViewBridge to be available
`javascript
window.addEventListener("ns-bridge-ready", function(e) {
var nsWebViewBridge = e.detail || window.nsWebViewBridge; // do stuff here
});
`Possible features to come:
* Cookie helpers?
* Share cache with native-layer?
$3
* Settings
* AppCache?
* User agent?#### iOS
* Settings?
Demo and unit tests
$3
To run the demo-project, the plugin must be build locally and a http-server must be running.
The easiest way to run the demo is to follow these steps:
- Clone the git repository from https://github.com/Notalib/nativescript-webview-ext.git
- Go into the
-folder
- Use the npm-scripts:
- npm run demo.ios
- npm run demo.android$3
- Clone the git repository from https://github.com/Notalib/nativescript-webview-ext.git
- Go into the
src`-folderApache License Version 2.0, January 2004
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