react-native/docs/webview.md

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id	title	layout	category	permalink	next	previous
webview	WebView	docs	components	docs/webview.html	accessibilityinfo	virtualizedlist

WebView renders web content in a native view.

import React, { Component } from 'react';
import { WebView } from 'react-native';

class MyWeb extends Component {
  render() {
    return (
      <WebView
        source={{uri: 'https://github.com/facebook/react-native'}}
        style={{marginTop: 20}}
      />
    );
  }
}

You can use this component to navigate back and forth in the web view's history and configure various properties for the web content.

Props

• View props...
• source
• automaticallyAdjustContentInsets
• injectJavaScript
• injectedJavaScript
• mediaPlaybackRequiresUserAction
• nativeConfig
• onError
• onLoad
• onLoadEnd
• onLoadStart
• onMessage
• onNavigationStateChange
• renderError
• renderLoading
• scalesPageToFit
• onShouldStartLoadWithRequest
• startInLoadingState
• style
• decelerationRate
• domStorageEnabled
• javaScriptEnabled
• mixedContentMode
• thirdPartyCookiesEnabled
• userAgent
• allowsInlineMediaPlayback
• bounces
• contentInset
• dataDetectorTypes
• scrollEnabled
• url
• html

Methods

• extraNativeComponentConfig

---

Reference

Props

source

Loads static html or a uri (with optional headers) in the WebView.

Type	Required
object: {uri: string, method: string, headers: object, body: string},object: {html: string, baseUrl: string}, number	No

Keys:

An object with either set of keys can be used. Shape:

• uri - The URI to load in the WebView. Can be a local or remote file.
• method - The HTTP Method to use. Defaults to GET if not specified. On Android, only GET and POST are supported.
• headers - Additional HTTP headers to send with the request. On Android, this can only be used with GET requests.
• body - 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.

Shape:

• html - A static HTML page to display in the WebView.
• baseUrl - The base URL to be used for any relative links in the HTML.

The packager uses a third type, number, internally.

---

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

---

injectJavaScript

Function that accepts a string that will be passed to the WebView and executed immediately as JavaScript.

Type	Required
function	No

---

injectedJavaScript

Set this to provide JavaScript that will be injected into the web page when the view loads.

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.

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.

Type	Required
object: {component: any,props: object,viewManager: object}	No

Keys:

• component - The native component used to render the WebView.
• props - Set props directly on the native component WebView. Enables custom props which the original WebView doesn't pass through.
• viewManager - Set the ViewManager to use for communication with the native side. iOS only.

---

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

---

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

---

renderError

Function that returns a view to show if there's an error.

Type	Required
function	No

---

renderLoading

Function that returns a loading indicator.

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.

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.

Type	Required
bool	No

---

style

The style to apply to the WebView.

Type	Required
ViewPropTypes.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
ScrollView.propTypes.decelerationRate	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
enum('never', 'always', 'compatibility')	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.

Type	Required	Platform
string	No	Android

---

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 the webkit-playsinline attribute.

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

---

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:

• 'phoneNumber'
• 'link'
• 'address'
• 'calendarEvent'
• 'none'
• 'all'

Type	Required	Platform
enum('phoneNumber', 'link', 'address', 'calendarEvent', 'none', 'all'), array of enum('phoneNumber', 'link', 'address', 'calendarEvent', 'none', 'all')	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

---

url

Deprecated. Use the source prop instead.

Type	Required
string	No

---

html

Deprecated. Use the source prop instead.

Type	Required
string	No

Methods

extraNativeComponentConfig()

WebView.extraNativeComponentConfig()