WebView

enum WebViewSandboxMode {
    None = 0,
    AllowForms = 1 << 0,
    AllowModals = 1 << 1,
    AllowOrientationLock = 1 << 2,
    AllowPointerLock = 1 << 3,
    AllowPopups = 1 << 4,
    AllowPopupsToEscapeSandbox = 1 << 5,
    AllowPresentation = 1 << 6,
    AllowSameOrigin = 1 << 7,
    AllowScripts = 1 << 8,
    AllowTopNavigation = 1 << 9,

    // Control https mixed content behavior, never by default
    AllowMixedContentAlways = 1 << 10,
    AllowMixedContentCompatibilityMode = 1 << 11
}

interface WebViewNavigationState {
    canGoBack: boolean;
    canGoForward: boolean;
    loading: boolean;
    url: string;
    title: string;
    readonly navigationType:
        | 'click'
        | 'formsubmit'
        | 'backforward'
        | 'reload'
        | 'formresubmit'
        | 'other';
}

interface WebViewErrorState {
    description: string;
    domain: string;
    code: string;
}

interface WebViewSource {
    html: string;
    baseUrl?: string; // Native only
}

// Allow javascript code to call storage methods?
domStorageEnabled: boolean = true; // Native only

// JavaScript code that is injected into the control and executed
injectedJavaScript: string = undefined; // Native only

// Is JavaScript executed within the control?
javaScriptEnabled: boolean = true;

// Determines whether HTML5 audio and video requires the user to tap them before they start playing.
mediaPlaybackRequiresUserAction: boolean = true; // Native only

// Determines whether HTML5 videos play inline or use the native full-screen controller.
allowsInlineMediaPlayback: boolean = false; // iOS only

// HTTP headers to include when fetching the URL.
headers: { [headerName: string]: string } = undefined;

// Called when an error occurs that prevents the contents from loading
onError: (e: SyntheticEvent) => void = undefined; // Native only

// Called when the contents successfully load
onLoad: (e: SyntheticEvent) => void = undefined;

// Called when the contents start to load
onLoadStart: (e: SyntheticEvent) => void = undefined; // Native only

// Called when a message is posted from within a WebView
onMessage: (e: WebViewMessageEvent) => void = undefined;

// Called when the navigation state changes
onNavigationStateChange: (navigationState: WebViewNavigationState) => void; // Native only

// Flags that restrict behaviors within the control
sandbox: WebViewSandboxMode = None;

// Zooms the page contents to fit the available space; deprecated on
// iOS in RN 0.57
scalesPageToFit: boolean = false; // Native only

// HTML to display in webview (if url is not specified)
source: WebViewSource = undefined;

// Start loading immediately or wait for reload?
startInLoadingState: boolean = true; // Native only

// See below for supported styles
style: WebViewStyleRuleSet | WebViewStyleRuleSet[] = [];

// ID that can be used to identify the instantiated element for testing purposes.
testId: string = undefined;

// URL to HTML content
url: string = undefined;

// Navigate back and forward
goBack();
goForward();

// Posts a message to the web control, allowing for communication between
// the app and the JavaScript code running within the web control. On native
// platforms, the targetOrigin is ignored.
postMessage(message: string, targetOrigin?: string = '*'): void;

// Force the page to reload
reload();