Reference.md 17KB
React Native WebView API Reference
This document lays out the current public properties and methods for the React Native WebView.
Security Warning: Currently,
onMessageandpostMessagedo not allow specifying an origin. This can lead to cross-site scripting attacks if an unexpected document is loaded within aWebViewinstance. Please refer to the MDN documentation forWindow.postMessage()for more details on the security implications of this.
Props Index
sourceautomaticallyAdjustContentInsetsinjectedJavaScriptmediaPlaybackRequiresUserActionnativeConfigonErroronLoadonLoadEndonLoadStartonLoadProgressonMessageonNavigationStateChangeoriginWhitelistrenderErrorrenderLoadingscalesPageToFitonShouldStartLoadWithRequeststartInLoadingStatestyledecelerationRatedomStorageEnabledjavaScriptEnabledmixedContentModethirdPartyCookiesEnableduserAgentallowsInlineMediaPlaybackbouncesoverScrollModecontentInsetdataDetectorTypesscrollEnabledgeolocationEnabledallowUniversalAccessFromFileURLsuseWebKiturlhtmlhideKeyboardAccessoryViewallowsBackForwardNavigationGesturesincognitoallowFileAccesssaveFormDataDisabledpagingEnabledallowsLinkPreview
Methods Index
Reference
Props
source
Loads static HTML or a URI (with optional headers) in the WebView. Note that static HTML will require setting originWhitelist to ["*"].
The object passed to source can have either of the following shapes:
Load uri
uri(string) - The URI to load in theWebView. Can be a local or remote file.method(string) - The HTTP Method to use. Defaults to GET if not specified. On Android, the only supported methods are GET and POST.headers(object) - Additional HTTP headers to send with the request. On Android, this can only be used with GET requests.body(string) - The HTTP body to send with the request. This must be a valid UTF-8 string, and will be sent exactly as specified, with no additional encoding (e.g. URL-escaping or base64) applied. On Android, this can only be used with POST requests.
Static HTML
Note that using static HTML requires the WebView property originWhiteList to ['*'].
html(string) - A static HTML page to display in the WebView.baseUrl(string) - The base URL to be used for any relative links in the HTML.
| Type | Required |
|---|---|
| object | No |
automaticallyAdjustContentInsets
Controls whether to adjust the content inset for web views that are placed behind a navigation bar, tab bar, or toolbar. The default value is true.
| Type | Required |
|---|---|
| bool | No |
injectedJavaScript
Set this to provide JavaScript that will be injected into the web page when the view loads. Make sure the string evaluates to a valid type (true works) and doesn’t otherwise throw an exception.
| Type | Required |
|---|---|
| string | No |
mediaPlaybackRequiresUserAction
Boolean that determines whether HTML5 audio and video requires the user to tap them before they start playing. The default value is true. (Android API minimum version 17)
| Type | Required |
|---|---|
| bool | No |
nativeConfig
Override the native component used to render the WebView. Enables a custom native WebView which uses the same JavaScript as the original WebView.
The nativeConfig prop expects an object with the following keys:
component(any)props(object)viewManager(object)
| Type | Required |
|---|---|
| object | No |
onError
Function that is invoked when the WebView load fails.
| Type | Required |
|---|---|
| function | No |
onLoad
Function that is invoked when the WebView has finished loading.
| Type | Required |
|---|---|
| function | No |
onLoadEnd
Function that is invoked when the WebView load succeeds or fails.
| Type | Required |
|---|---|
| function | No |
onLoadStart
Function that is invoked when the WebView starts loading.
| Type | Required |
|---|---|
| function | No |
onLoadProgress
Function that is invoked when the WebView is loading.
Note
On iOS, when useWebKit=false, this prop will not work. On android, You can’t get the url property, meaning that
event.nativeEvent.urlwill be null.
| Type | Required |
|---|---|
| function | No |
onMessage
A function that is invoked when the webview calls window.postMessage. Setting this property will inject a postMessage global into your webview, but will still call pre-existing values of postMessage.
window.postMessage accepts one argument, data, which will be available on the event object, event.nativeEvent.data. data must be a string.
| Type | Required |
|---|---|
| function | No |
onNavigationStateChange
Function that is invoked when the WebView loading starts or ends.
| Type | Required |
|---|---|
| function | No |
originWhitelist
List of origin strings to allow being navigated to. The strings allow wildcards and get matched against just the origin (not the full URL). If the user taps to navigate to a new page but the new page is not in this whitelist, the URL will be handled by the OS. The default whitelisted origins are “http://” and “https://”.
| Type | Required |
|---|---|
| array of strings | No |
renderError
Function that returns a view to show if there’s an error.
| Type | Required |
|---|---|
| function | No |
renderLoading
Function that returns a loading indicator. The startInLoadingState prop must be set to true in order to use this prop.
| Type | Required |
|---|---|
| function | No |
scalesPageToFit
Boolean that controls whether the web content is scaled to fit the view and enables the user to change the scale. The default value is true.
On iOS, when useWebKit=true, this prop will not work.
| Type | Required |
|---|---|
| bool | No |
onShouldStartLoadWithRequest
Function that allows custom handling of any web view requests. Return true from the function to continue loading the request and false to stop loading.
| Type | Required | Platform |
|---|---|---|
| function | No | iOS |
startInLoadingState
Boolean value that forces the WebView to show the loading view on the first load. This prop must be set to true in order for the renderLoading prop to work.
| Type | Required |
|---|---|
| bool | No |
style
A style object that allow you to customize the WebView style. Please note that there are default styles (example: you need to add flex: 0 to the style if you want to use height property).
| Type | Required |
|---|---|
| style | No |
decelerationRate
A floating-point number that determines how quickly the scroll view decelerates after the user lifts their finger. You may also use the string shortcuts "normal" and "fast" which match the underlying iOS settings for UIScrollViewDecelerationRateNormal and UIScrollViewDecelerationRateFast respectively:
- normal: 0.998
- fast: 0.99 (the default for iOS web view)
| Type | Required | Platform |
|---|---|---|
| number | No | iOS |
domStorageEnabled
Boolean value to control whether DOM Storage is enabled. Used only in Android.
| Type | Required | Platform |
|---|---|---|
| bool | No | Android |
javaScriptEnabled
Boolean value to enable JavaScript in the WebView. Used on Android only as JavaScript is enabled by default on iOS. The default value is true.
| Type | Required | Platform |
|---|---|---|
| bool | No | Android |
mixedContentMode
Specifies the mixed content mode. i.e WebView will allow a secure origin to load content from any other origin.
Possible values for mixedContentMode are:
never(default) - WebView will not allow a secure origin to load content from an insecure origin.always- WebView will allow a secure origin to load content from any other origin, even if that origin is insecure.compatibility- WebView will attempt to be compatible with the approach of a modern web browser with regard to mixed content.
| Type | Required | Platform |
|---|---|---|
| string | No | Android |
thirdPartyCookiesEnabled
Boolean value to enable third party cookies in the WebView. Used on Android Lollipop and above only as third party cookies are enabled by default on Android Kitkat and below and on iOS. The default value is true.
| Type | Required | Platform |
|---|---|---|
| bool | No | Android |
userAgent
Sets the user-agent for the WebView. This will only work for iOS if you are using WKWebView, not UIWebView (see https://developer.apple.com/documentation/webkit/wkwebview/1414950-customuseragent).
| Type | Required | Platform |
|---|---|---|
| string | No | Android, iOS WKWebView |
allowsInlineMediaPlayback
Boolean that determines whether HTML5 videos play inline or use the native full-screen controller. The default value is false.
NOTE
In order for video to play inline, not only does this property need to be set to
true, but the video element in the HTML document must also include thewebkit-playsinlineattribute.
| Type | Required | Platform |
|---|---|---|
| bool | No | iOS |
bounces
Boolean value that determines whether the web view bounces when it reaches the edge of the content. The default value is true.
| Type | Required | Platform |
|---|---|---|
| bool | No | iOS |
overScrollMode
Specifies the over scroll mode.
Possible values for overScrollMode are:
always(default) - Always allow a user to over-scroll this view, provided it is a view that can scroll.content- Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll.never- Never allow a user to over-scroll this view.
| Type | Required | Platform |
|---|---|---|
| string | No | Android |
contentInset
The amount by which the web view content is inset from the edges of the scroll view. Defaults to {top: 0, left: 0, bottom: 0, right: 0}.
| Type | Required | Platform |
|---|---|---|
| object: {top: number, left: number, bottom: number, right: number} | No | iOS |
dataDetectorTypes
Determines the types of data converted to clickable URLs in the web view’s content. By default only phone numbers are detected.
You can provide one type or an array of many types.
Possible values for dataDetectorTypes are:
phoneNumberlinkaddresscalendarEventnoneall
With the new WebKit implementation, we have three new values:
trackingNumberflightNumberlookupSuggestion
| Type | Required | Platform |
|---|---|---|
| string, or array | No | iOS |
scrollEnabled
Boolean value that determines whether scrolling is enabled in the WebView. The default value is true.
| Type | Required | Platform |
|---|---|---|
| bool | No | iOS |
geolocationEnabled
Set whether Geolocation is enabled in the WebView. The default value is false. Used only in Android.
| Type | Required | Platform |
|---|---|---|
| bool | No | Android |
allowUniversalAccessFromFileURLs
Boolean that sets whether JavaScript running in the context of a file scheme URL should be allowed to access content from any origin. Including accessing content from other file scheme URLs. The default value is false.
| Type | Required | Platform |
|---|---|---|
| bool | No | Android |
useWebKit
If true, use WKWebView instead of UIWebView.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS |
url
Deprecated. Use the source prop instead.
| Type | Required |
|---|---|
| string | No |
html
Deprecated. Use the source prop instead.
| Type | Required |
|---|---|
| string | No |
hideKeyboardAccessoryView
If true, this will hide the keyboard accessory view (< > and Done) when using the WKWebView.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS |
allowsBackForwardNavigationGestures
If true, this will be able horizontal swipe gestures when using the WKWebView. The default value is false.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS |
incognito
Does not store any data within the lifetime of the WebView.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS WKWebView |
allowFileAccess
If true, this will allow access to the file system via file:// URI’s. The default value is false.
| Type | Required | Platform |
|---|---|---|
| boolean | No | Android |
saveFormDataDisabled
Sets whether the WebView should disable saving form data. The default value is false. This function does not have any effect from Android API level 26 onwards as there is an Autofill feature which stores form data.
| Type | Required | Platform |
|---|---|---|
| boolean | No | Android |
pagingEnabled
If the value of this property is true, the scroll view stops on multiples of the scroll view’s bounds when the user scrolls. The default value is false.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS |
allowsLinkPreview
A Boolean value that determines whether pressing on a link displays a preview of the destination for the link. In iOS this property is available on devices that support 3D Touch. In iOS 10 and later, the default value is true; before that, the default value is false.
| Type | Required | Platform |
|---|---|---|
| boolean | No | iOS |
Methods
extraNativeComponentConfig()
static extraNativeComponentConfig()
goForward()
goForward();
Go forward one page in the web view’s history.
goBack()
goBack();
Go back one page in the web view’s history.
reload()
reload();
Reloads the current page.
stopLoading()
stopLoading();
Stop loading the current page.
injectJavaScript(str)
injectJavaScript('... javascript string ...');
Executes the JavaScript string.
Other Docs
Also check out our Getting Started Guide and In-Depth Guide.