# Class BrowserComponent

java.lang.Object
com.codename1.ui.Component
com.codename1.ui.Container
com.codename1.ui.BrowserComponent

All Implemented Interfaces:
  `Animation, Editable, StyleListener, Iterable<Component>`

public class BrowserComponent extends Container

The browser component is an interface to an embeddable native platform browser on platforms that support embedding the native browser in place, if you need wide compatibility and flexibility you should check out the HTMLComponent which provides a lightweight 100% cross platform web component.

This component will only work on platforms that support embedding a native browser which exclude earlier versions of Blackberry devices and J2ME devices.

Its recommended that you place this component in a fixed position (none scrollable) on the screen without other focusable components to prevent confusion between focus authority and allow the component to scroll itself rather than CodenameOne making that decision for it.

On Android this component might show a native progress indicator dialog. You can disable that functionality using the `Display.getInstance().setProperty("WebLoadingHidden", "true");` call.

The following code shows the basic usage of the `BrowserComponent`:

    Form hi = new Form("Browser", new BorderLayout());
    BrowserComponent browser = new BrowserComponent();
    browser.setURL("https://www.codenameone.com/");
    hi.add(BorderLayout.CENTER, browser);

Debugging on Android

You can use Chrome's remote debugging features to debug the contents of a BrowserComponent. On Android 4.4 (KitKat) and higher, you will need to define the "android.webContentsDebuggingEnabled" display property in order for this to work. You can define this inside your app's init() method:

`java Display.getInstance().setProperty("android.webContentsDebuggingEnabled", "true");`

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `static class`
  `BrowserComponent.JSExpression`
  A wrapper class for a literal javascript expression that can be passed as an arg in `java.lang.Object[])`.
  `class`
  `BrowserComponent.JSProxy`
  A thin wrapper around a Javascript variable that makes it easier to call methods on that variable.
  `static class`
  `BrowserComponent.JSRef`
  A wrapper class for a Javascript value that is returned via the `com.codename1.util.Callback)` method.
  `static enum`
  `BrowserComponent.JSType`
  Enum with the possible types for a `JSRef` object.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final String`
  `BROWSER_PROPERTY_FOLLOW_TARGET_BLANK`
  Browser property key to control whether links with `target="_blank"` or `target="_new"` should be followed in the current browser view.
  `static final String`
  `onError`
  String constant for web event listener `com.codename1.ui.events.ActionListener)`
  `static final String`
  `onLoad`
  String constant for web event listener `com.codename1.ui.events.ActionListener)`
  `static final String`
  `onMessage`
  String constant for web event listener.
  `static final String`
  `onStart`
  String constant for web event listener `com.codename1.ui.events.ActionListener)`

  ### Fields inherited from class Component

  `BASELINE, BOTTOM, BRB_CENTER_OFFSET, BRB_CONSTANT_ASCENT, BRB_CONSTANT_DESCENT, BRB_OTHER, CENTER, CROSSHAIR_CURSOR, DEFAULT_CURSOR, DRAG_REGION_IMMEDIATELY_DRAG_X, DRAG_REGION_IMMEDIATELY_DRAG_XY, DRAG_REGION_IMMEDIATELY_DRAG_Y, DRAG_REGION_LIKELY_DRAG_X, DRAG_REGION_LIKELY_DRAG_XY, DRAG_REGION_LIKELY_DRAG_Y, DRAG_REGION_NOT_DRAGGABLE, DRAG_REGION_POSSIBLE_DRAG_X, DRAG_REGION_POSSIBLE_DRAG_XY, DRAG_REGION_POSSIBLE_DRAG_Y, E_RESIZE_CURSOR, HAND_CURSOR, LEFT, MOVE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR, NW_RESIZE_CURSOR, RIGHT, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, SW_RESIZE_CURSOR, TEXT_CURSOR, TOP, W_RESIZE_CURSOR, WAIT_CURSOR`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `BrowserComponent()`
  This constructor will work as expected when a browser component is supported, see isNativeBrowserSupported()

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addBrowserNavigationCallback(BrowserNavigationCallback callback)`
  Adds a navigation callback.
  `void`
  `addJSCallback(String installJs, SuccessCallback<BrowserComponent.JSRef> callback)`
  Registers a Java method as a callback in javascript.
  `void`
  `addJSCallback(String installJs, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)`
  Registers Java method as a callback in Javascript.
  `void`
  `addWebEventListener(String type, ActionListener listener)`
  Adds a listener to the given event type name, event type names are platform specific but some must be fired for all platforms and will invoke the action listener when the appropriate event loads
  `void`
  `back()`
  Navigates back in the history
  `AsyncResource<Image>`
  `captureScreenshot()`
  Async method for capturing a screenshot of the browser content.
  `void`
  `clearHistory()`
  Clears navigation history
  `static String`
  `createDataURI(byte[] data, String mime)`
  This method creates a data URI which allows developers creating HTML for local use to embed local images into the HTML by appending them as a URI.
  `BrowserComponent.JSProxy`
  `createJSProxy(String javascriptExpression)`
  Creates a proxy for a Javascript object that makes it easier to call methods, retrieve, and manipulate properties on the object.
  `protected void`
  `deinitialize()`
  Invoked to indicate that the component initialization is being reversed since the component was detached from the container hierarchy.
  `void`
  `destroy()`
  Release native resources of this Browser Component
  `void`
  `execute(int timeout, String js, SuccessCallback<BrowserComponent.JSRef> callback)`
  Execute javascript with a timeout.
  `void`
  `execute(int timeout, String js, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)`
  Executes Javascript expression.
  `void`
  `execute(String javaScript)`
  Executes the given JavaScript string within the current context
  `void`
  `execute(String js, SuccessCallback<BrowserComponent.JSRef> callback)`
  Asynchronously executes the provided javascript expression.
  `void`
  `execute(String js, java.lang.Object[] params)`
  Executes given javascript string within current context.
  `void`
  `execute(String js, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)`
  Executes Javascript expression.
  `String`
  `executeAndReturnString(String javaScript)`
  Executes the given JavaScript and returns a result string from the underlying platform where applicable.
  `String`
  `executeAndReturnString(String javaScript, java.lang.Object[] params)`
  Executes the given javascript and returns the result string from the underlying platform.
  `BrowserComponent.JSRef`
  `executeAndWait(int timeout, String js)`
  This uses invokeAndBlock to wait for the result of the given javascript expression.
  `BrowserComponent.JSRef`
  `executeAndWait(int timeout, String js, java.lang.Object... params)`
  This uses invokeAndBlock to wait for the result of the given javascript expression.
  `BrowserComponent.JSRef`
  `executeAndWait(String js)`
  This uses invokeAndBlock to wait for the result of the given javascript expression.
  `BrowserComponent.JSRef`
  `executeAndWait(String js, java.lang.Object... params)`
  This uses invokeAndBlock to wait for the result of the given javascript expression.
  `void`
  `exposeInJavaScript(java.lang.Object o, String name)`
  Allows exposing the given object to JavaScript code so the JavaScript code can invoke methods and access fields on the given object.
  `boolean`
  `fireBrowserNavigationCallbacks(String url)`
  Fires all of the registered browser navigation callbacks against the provided URL.
  `void`
  `fireWebEvent(String type, ActionEvent ev)`
  Used internally by the implementation to fire an event from the native browser widget
  `void`
  `forward()`
  Navigates forward in the history
  `BrowserNavigationCallback`
  `getBrowserNavigationCallback()`
  The browser navigation callback interface allows handling a case where a URL invocation can be delegated to Java code.
  `String`
  `getTitle()`
  The page title
  `String`
  `getURL()`
  The page URL
  `boolean`
  `hasBack()`
  Indicates whether back is currently available
  `boolean`
  `hasForward()`
  Indicates whether forward is currently available
  `static String`
  `injectParameters(String jsExpression, java.lang.Object... params)`
  Injects parameters into a Javascript string expression.
  `boolean`
  `isDebugMode()`
  Indicates if debug mode is set (might have no effect though)
  `boolean`
  `isFireCallbacksOnEdt()`
  Checks if javascript callbacks are run on the EDT.
  `static boolean`
  `isNativeBrowserSupported()`
  Returns true if the platform supports embedding a native browser component
  `boolean`
  `isNativeScrollingEnabled()`
  This method is unreliable and is only here for consistency with setNativeScrollingEnabled.
  `boolean`
  `isPinchToZoomEnabled()`
  This method is unreliable and is only here for consistency with setPinchToZoomEnabled, it will not return whether the platform supports pinch since this is very hard to detect properly.
  `boolean`
  `isURLWithCustomHeadersSupported()`
  Returns true if the method `java.util.Map)` is supported
  `void`
  `postMessage(String message, String targetOrigin)`
  Calls the postMessage() method on the webpage's window object.
  `void`
  `putClientProperty(String key, java.lang.Object value)`
  Sets a client property on this component.
  `AsyncResource<BrowserComponent>`
  `ready()`
  Returns a promise that will complete when the browser component is "ready".
  `AsyncResource<BrowserComponent>`
  `ready(int timeout)`
  Returns a promise that will complete when the browser component is "ready".
  `BrowserComponent`
  `ready(SuccessCallback<BrowserComponent> onReady)`
  Registers a callback to be run when the BrowserComponent is "ready".
  `void`
  `reload()`
  Reload the current page
  `void`
  `removeBrowserNavigationCallback(BrowserNavigationCallback callback)`
  Removes a navigation callback.
  `void`
  `removeJSCallback(Callback<BrowserComponent.JSRef> callback)`
  Removes a JS callback that was added via the `com.codename1.util.SuccessCallback)` method.
  `void`
  `removeJSCallback(SuccessCallback<BrowserComponent.JSRef> callback)`
  `void`
  `removeWebEventListener(String type, ActionListener listener)`
  Removes the listener, see addWebEventListener for details
  `void`
  `setBrowserNavigationCallback(BrowserNavigationCallback callback)`
  Set the browser navigation callback which allows handling a case where a URL invocation can be delegated to Java code.
  `void`
  `setDebugMode(boolean mode)`
  Toggles debug mode for the browser component which helps detect coding errors in the JavaScript bridge logic
  `void`
  `setFireCallbacksOnEdt(boolean edt)`
  Sets whether javascript callbacks should be run on the EDT.
  `void`
  `setNativeScrollingEnabled(boolean b)`
  This flag allows disabling the native browser scrolling on platforms that support it
  `void`
  `setPage(String html, String baseUrl)`
  Shows the given HTML in the native viewer
  `void`
  `setPinchToZoomEnabled(boolean e)`
  Some platforms require that you enable pinch to zoom explicitly.
  `void`
  `setProperty(String key, java.lang.Object value)`
  This method allows customizing the properties of a web view in various ways including platform specific settings.
  `void`
  `setURL(URL url)`
  Sets the page URL.
  `void`
  `setURL(String url)`
  Sets the page URL, jar: URL's must be supported by the implementation
  `void`
  `setURL(String url, Map<String,String> headers)`
  Sets the page URL, jar: URL's must be supported by the implementation.
  `void`
  `setURL(java.net.URI uri)`
  Sets the page URL.
  `void`
  `setURLHierarchy(String url)`
  Sets the page URL while respecting the hierarchy of the html
  `void`
  `stop()`
  Cancel the loading of the current page
  `void`
  `waitForReady()`
  Uses invokeAndBlock to wait until the BrowserComponent is ready.

  ### Methods inherited from class Container

  `add, add, add, add, add, add, addAll, addComponent, addComponent, addComponent, addComponent, animateHierarchy, animateHierarchyAndWait, animateHierarchyFade, animateHierarchyFadeAndWait, animateLayout, animateLayoutAndWait, animateLayoutFade, animateLayoutFadeAndWait, animateUnlayout, animateUnlayoutAndWait, applyRTL, calcPreferredSize, cancelRepaints, clearClientProperties, constrainHeightWhenScrollable, constrainWidthWhenScrollable, contains, createAnimateHierarchy, createAnimateHierarchyFade, createAnimateLayout, createAnimateLayoutFade, createAnimateLayoutFadeAndWait, createAnimateMotion, createAnimateUnlayout, createReplaceTransition, dragInitiated, drop, encloseIn, encloseIn, findDropTargetAt, findFirstFocusable, fireClicked, flushReplace, forceRevalidate, getBottomGap, getChildrenAsList, getClosestComponentTo, getComponentAt, getComponentAt, getComponentCount, getComponentIndex, getGridPosX, getGridPosY, getLayout, getLayoutHeight, getLayoutWidth, getLeadComponent, getLeadParent, getResponderAt, getSafeAreaRoot, getScrollIncrement, getSideGap, getUIManager, initLaf, invalidate, isEnabled, isSafeArea, isSafeAreaRoot, isScrollableX, isScrollableY, isSelectableInteraction, isSurface, iterator, iterator, keyPressed, keyReleased, layoutContainer, morph, morphAndWait, paint, paintComponentBackground, paintGlass, paramString, pointerPressed, refreshTheme, removeAll, removeComponent, replace, replace, replaceAndWait, replaceAndWait, replaceAndWait, revalidate, revalidateLater, revalidateWithAnimationSafety, scrollComponentToVisible, setCellRenderer, setEnabled, setLayout, setLeadComponent, setSafeArea, setSafeAreaRoot, setScrollable, setScrollableX, setScrollableY, setScrollIncrement, setShouldCalcPreferredSize, setShouldLayout, setUIManager, updateTabIndices`

  ### Methods inherited from class Component

  `addDragFinishedListener, addDragOverListener, addDropListener, addFocusListener, addLongPressListener, addPointerDraggedListener, addPointerPressedListener, addPointerReleasedListener, addPullToRefresh, addScrollListener, addStateChangeListener, animate, announceForAccessibility, bindProperty, blocksSideSwipe, calcScrollSize, contains, containsOrOwns, createStyleAnimation, deinitializeCustomStyle, dragEnter, dragExit, dragFinished, draggingOver, drawDraggedImage, focusGained, focusLost, getAbsoluteX, getAbsoluteY, getAccessibilityText, getAllStyles, getAnimationManager, getBaseline, getBaselineResizeBehavior, getBindablePropertyNames, getBindablePropertyTypes, getBorder, getBoundPropertyValue, getBounds, getBounds, getClientProperty, getCloudBoundProperty, getCloudDestinationProperty, getComponentForm, getComponentState, getCursor, getDefaultDragTransparency, getDirtyRegion, getDisabledStyle, getDraggedx, getDraggedy, getDragImage, getDragRegionStatus, getDragSpeed, getDragTransparency, getEditingDelegate, getHeight, getInlineAllStyles, getInlineDisabledStyles, getInlinePressedStyles, getInlineSelectedStyles, getInlineStylesTheme, getInlineUnselectedStyles, getInnerHeight, getInnerPreferredH, getInnerPreferredW, getInnerWidth, getInnerX, getInnerY, getLabelForComponent, getName, getNativeOverlay, getNextFocusDown, getNextFocusLeft, getNextFocusRight, getNextFocusUp, getOuterHeight, getOuterPreferredH, getOuterPreferredW, getOuterWidth, getOuterX, getOuterY, getOwner, getParent, getPreferredH, getPreferredSize, getPreferredSizeStr, getPreferredTabIndex, getPreferredW, getPressedStyle, getPropertyNames, getPropertyTypeNames, getPropertyTypes, getPropertyValue, getSameHeight, getSameWidth, getScrollable, getScrollAnimationSpeed, getScrollDimension, getScrollOpacity, getScrollOpacityChangeSpeed, getScrollX, getScrollY, getSelectCommandText, getSelectedRect, getSelectedStyle, getStyle, getTabIndex, getTensileLength, getTextSelectionSupport, getTooltip, getUIID, getUnselectedStyle, getVisibleBounds, getVisibleBounds, getWidth, getX, getY, growShrink, handlesInput, hasFixedPreferredSize, hasFocus, hideNativeOverlay, initComponent, initCustomStyle, initDisabledStyle, initPressedStyle, initSelectedStyle, initUnselectedStyle, installDefaultPainter, isAlwaysTensile, isBlockLead, isCellRenderer, isChildOf, isDragActivated, isDragAndDropOperation, isDraggable, isDragRegion, isDropTarget, isEditable, isEditing, isFlatten, isFocusable, isGrabsPointerEvents, isHidden, isHidden, isHideInLandscape, isHideInPortrait, isHScrollThumbGrabbed, isHScrollThumbHover, isIgnorePointerEvents, isInClippingRegion, isInitialized, isOpaque, isOwnedBy, isPinchBlocksDragAndDrop, isRippleEffect, isRTL, isScrollable, isScrollVisible, isSetCursorSupported, isSmoothScrolling, isSnapToGrid, isStickyDrag, isTactileTouch, isTactileTouch, isTensileDragEnabled, isTraversable, isVisible, isVScrollThumbGrabbed, isVScrollThumbHover, keyRepeated, laidOut, longKeyPress, longPointerPress, onScrollX, onScrollY, onSetFocusable, paintBackground, paintBackgrounds, paintBorder, paintBorderBackground, paintComponent, paintComponent, paintIntersectingComponentsAbove, paintLock, paintLockRelease, paintRippleOverlay, paintScrollbars, paintScrollbarX, paintScrollbarY, paintShadows, parsePreferredSize, pinch, pinch, pinchReleased, pointerDragged, pointerDragged, pointerHover, pointerHoverPressed, pointerHoverReleased, pointerPressed, pointerReleased, pointerReleased, refreshTheme, refreshTheme, remove, removeDragFinishedListener, removeDragOverListener, removeDropListener, removeFocusListener, removeLongPressListener, removePointerDraggedListener, removePointerPressedListener, removePointerReleasedListener, removeScrollListener, removeStateChangeListener, repaint, repaint, requestFocus, resetFocusable, respondsToPointerEvents, scrollRectToVisible, scrollRectToVisible, setAccessibilityText, setAlwaysTensile, setBlockLead, setBoundPropertyValue, setCloudBoundProperty, setCloudDestinationProperty, setComponentState, setCursor, setDefaultDragTransparency, setDirtyRegion, setDisabledStyle, setDraggable, setDragTransparency, setDropTarget, setEditingDelegate, setFlatten, setFocus, setFocusable, setGrabsPointerEvents, setHandlesInput, setHeight, setHidden, setHidden, setHideInLandscape, setHideInPortrait, setHorizontalScrollBounds, setIgnorePointerEvents, setInitialized, setInlineAllStyles, setInlineDisabledStyles, setInlinePressedStyles, setInlineSelectedStyles, setInlineStylesTheme, setInlineUnselectedStyles, setIsScrollVisible, setLabelForComponent, setName, setNextFocusDown, setNextFocusLeft, setNextFocusRight, setNextFocusUp, setOpaque, setOwner, setPinchBlocksDragAndDrop, setPreferredH, setPreferredSize, setPreferredSizeStr, setPreferredTabIndex, setPreferredW, setPressedStyle, setPropertyValue, setPullToRefresh, setRippleEffect, setRTL, setSameHeight, setSameSize, setSameWidth, setScrollAnimationSpeed, setScrollOpacityChangeSpeed, setScrollSize, setScrollVisible, setScrollX, setScrollY, setSelectCommandText, setSelectedStyle, setSize, setSmoothScrolling, setSnapToGrid, setTabIndex, setTactileTouch, setTensileDragEnabled, setTensileLength, setTooltip, setTraversable, setUIID, setUIID, setUIIDFinal, setUnselectedStyle, setVerticalScrollBounds, setVisible, setWidth, setX, setY, shouldBlockSideSwipe, shouldBlockSideSwipeLeft, shouldBlockSideSwipeRight, shouldRenderComponentSelection, showNativeOverlay, startEditingAsync, stopEditing, stripMarginAndPadding, styleChanged, toImage, toString, unbindProperty, updateNativeOverlay, visibleBoundsContains`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

  ### Methods inherited from interface Iterable

  `forEach`

- ## Field Details

  - ### BROWSER_PROPERTY_FOLLOW_TARGET_BLANK

    public static final String BROWSER_PROPERTY_FOLLOW_TARGET_BLANK
    Browser property key to control whether links with `target="_blank"` or `target="_new"` should be followed in the current browser view. Defaults to `true`.
    See Also:
      - Constant Field Values

  - ### onStart

    public static final String onStart
    String constant for web event listener `com.codename1.ui.events.ActionListener)`
    See Also:
      - Constant Field Values

  - ### onLoad

    public static final String onLoad
    String constant for web event listener `com.codename1.ui.events.ActionListener)`
    See Also:
      - Constant Field Values

  - ### onError

    public static final String onError
    String constant for web event listener `com.codename1.ui.events.ActionListener)`
    See Also:
      - Constant Field Values

  - ### onMessage

    public static final String onMessage

    String constant for web event listener. Use this event types to register to receive messages in a cross-domain-safe way from the web page. To send a message from the webpage, the page should include a function like:

        `function postToCN1(msg) {
        if (window.cn1PostMessage) {
        // Case 1: Running inside native app in a WebView
        window.cn1PostMessage(msg);` else {
        // Case 2: Running inside a Javascript app in an iframe
        window.parent.postMessage(msg, '*');
        }
          }
        }

    Receiving a message:

        `myBrowserComponent.addWebEventListener(BrowserComponent.onMessage, e->{
        CN.callSerially(()->{
        Log.p("Message: "+e.getSource());
        Dialog.show("Here", (String)e.getSource(), "OK", null);`);
          });
        }

    See Also:
      - Constant Field Values

- ## Constructor Details

  - ### BrowserComponent

    public BrowserComponent()
    This constructor will work as expected when a browser component is supported, see isNativeBrowserSupported()

- ## Method Details

  - ### isNativeBrowserSupported

    public static boolean isNativeBrowserSupported()

    Returns true if the platform supports embedding a native browser component

    ###### Returns

    true if native browsing is supported

  - ### injectParameters

    public static String injectParameters(String jsExpression, java.lang.Object... params)

    Injects parameters into a Javascript string expression. This will quote strings properly. The expression should include placeholders for each parameter of the form ${0}, ${1}, etc..

    ###### Parameters

    - `jsExpression`: The javascript expression with placeholders to inject parameters.

    - `params`

    ###### Returns

    The expression with placeholders replaced by parameters.

  - ### createDataURI

    public static String createDataURI(byte[] data, String mime)

    This method creates a data URI which allows developers creating HTML for local use to embed local images into the HTML by appending them as a URI. E.g. instead of referencing a file or URL just load the image data and place the contents of this string into the src attribute.

    This is the easiest way to get an HTML with local images to work on all mobile platforms.

    ###### Parameters

    - `data`: data of an image

    - `mime`: the mime type of the image e.g. image/png

    ###### Returns

    a data URL that can be placed into the img src attribute in HTML e.g. data:image/png;base64,encodedData

    ###### Since

    6.0

  - ### isFireCallbacksOnEdt

    public boolean isFireCallbacksOnEdt()

    Checks if javascript callbacks are run on the EDT.

    ###### Returns

    True if javascript callbacks are run on the EDT.

    ###### Since

    5.0

    ###### See also

    - #setFireCallbacksOnEdt(boolean)

  - ### setFireCallbacksOnEdt

    public void setFireCallbacksOnEdt(boolean edt)

    Sets whether javascript callbacks should be run on the EDT. Default is true.

    ###### Parameters

    - `edt`: True if callbacks should be run on EDT. False if they should be run on the platform's main thread.

    ###### Since

    5.0

  - ### captureScreenshot

    public AsyncResource<Image> captureScreenshot()

    Async method for capturing a screenshot of the browser content. Currently only supported in the simulator. Also, only displays the visible rectangle of the BrowserComponent, not the entire page.

    ###### Returns

    AsyncResource resolving to an Image of the webview contents.

    ###### Since

    7.0

  - ### getBrowserNavigationCallback

    public BrowserNavigationCallback getBrowserNavigationCallback()

    The browser navigation callback interface allows handling a case where a URL invocation can be delegated to Java code. This allows binding Java side functionality to JavaScript functionality in the same way PhoneGap/Cordova work

    ###### Returns

    the callback interface

    ###### Deprecated

    Call `#fireBrowserNavigationCallbacks(java.lang.String)` to determine whether navigation should occur for a particulr URL.

  - ### setBrowserNavigationCallback

    public void setBrowserNavigationCallback(BrowserNavigationCallback callback)

    Set the browser navigation callback which allows handling a case where a URL invocation can be delegated to Java code. This allows binding Java side functionality to JavaScript functionality in the same way PhoneGap/Cordova work

    ###### Parameters

    - `callback`: the callback interface

    ###### Deprecated

    Use `addBrowserNavigationCallback(com.codename1.ui.events.BrowserNavigationCallback)` instead.

  - ### addBrowserNavigationCallback

    public void addBrowserNavigationCallback(BrowserNavigationCallback callback)

    Adds a navigation callback.

    ###### Parameters

    - `callback`: The callback to call before navigating to a URL.

  - ### removeBrowserNavigationCallback

    public void removeBrowserNavigationCallback(BrowserNavigationCallback callback)

    Removes a navigation callback.

    ###### Parameters

    - `callback`: The callback to call before navigating to a URL.

  - ### deinitialize

    protected void deinitialize()
    Description copied from class: `Component`
    Invoked to indicate that the component initialization is being reversed since the component was detached from the container hierarchy. This allows the component to deregister animators and cleanup after itself. This method is the opposite of the initComponent() method.
    Overrides:
      `deinitialize` in class `Component`

  - ### postMessage

    public void postMessage(String message, String targetOrigin)

    Calls the postMessage() method on the webpage's window object.

    This is useful mainly for the Javascript port so that you don't have to worry about cross-domain issues, as postMessage() is supported cross-domain.

    To receive a message, the web page should register a "message" event listener, just as it would to receive messages from other windows in the browser. See MDN docs for postMessage() for more information.

    ###### Parameters

    - `message`: The message to send.

    - `targetOrigin`: The target origin of the message. E.g. http://example.com:1234

    ###### Since

    7.0

  - ### fireBrowserNavigationCallbacks

    public boolean fireBrowserNavigationCallbacks(String url)

    Fires all of the registered browser navigation callbacks against the provided URL.

    ###### Parameters

    - `url`: The URL to fire the navigation callbacks against.

    ###### Returns

    True if all of the callbacks say that they can browse. False otherwise.

  - ### waitForReady

    public void waitForReady()
    Uses invokeAndBlock to wait until the BrowserComponent is ready. The browser component is considered to be ready once the onLoad event has been fired for the first page.

  - ### ready

    public BrowserComponent ready(SuccessCallback<BrowserComponent> onReady)

    Registers a callback to be run when the BrowserComponent is "ready". The browser component is considered to be ready once the onLoad event has been fired on the first page. If this method is called after the browser component is already "ready", then the callback will be executed immediately. Otherwise it will be called in the first onLoad event.

    ###### Parameters

    - `onReady`: Callback to be executed when the browser component is ready.

    ###### Returns

    Self for chaining.

    ###### Since

    7.0

    ###### See also

    - #waitForReady()

  - ### ready

    public AsyncResource<BrowserComponent> ready()

    Returns a promise that will complete when the browser component is "ready". It is considered to be ready once it has received the start or load event from at least one page. Default timeout is 5000ms.

    ###### Returns

    AsyncResouce that will complete when the browser component is ready.

    ###### Since

    7.0

  - ### ready

    public AsyncResource<BrowserComponent> ready(int timeout)

    Returns a promise that will complete when the browser component is "ready". It is considered to be ready once it has received the start or load event from at least one page.

    ###### Parameters

    - `timeout`: Timeout in milliseconds to wait.

    ###### Returns

    AsyncResouce that will complete when the browser component is ready.

    ###### Since

    7.0

  - ### setProperty

    public void setProperty(String key, java.lang.Object value)

    This method allows customizing the properties of a web view in various ways including platform specific settings. When a property isn't supported by a specific platform it is just ignored.

    ###### Parameters

    - `key`: see the documentation with the CodenameOne Implementation for further details

    - `value`: see the documentation with the CodenameOne Implementation for further details

  - ### getTitle

    public String getTitle()

    The page title

    ###### Returns

    the title

  - ### getURL

    public String getURL()

    The page URL

    ###### Returns

    the URL

  - ### setURL

    public void setURL(String url)

    Sets the page URL, jar: URL's must be supported by the implementation

    ###### Parameters

    - `url`: the URL

  - ### setURL

    public void setURL(URL url)

    Sets the page URL.

    ###### Parameters

    - `url`: The URL to the page to display.

  - ### setURL

    public void setURL(java.net.URI uri)

    Sets the page URL.

    ###### Parameters

    - `uri`: URI to the page to display.

  - ### setURL

    public void setURL(String url, Map<String,String> headers)

    Sets the page URL, jar: URL's must be supported by the implementation. Notice this API isn't supported in all platforms see `#isURLWithCustomHeadersSupported()`

    ###### Parameters

    - `url`: the URL

    - `headers`: headers to push into the request for the url

  - ### isURLWithCustomHeadersSupported

    public boolean isURLWithCustomHeadersSupported()

    Returns true if the method `java.util.Map)` is supported

    ###### Returns

    false by default

  - ### setURLHierarchy

    public void setURLHierarchy(String url) throws java.io.IOException

    Sets the page URL while respecting the hierarchy of the html

    ###### Parameters

    - `url`: the URL
    Throws:
      `java.io.IOException`

  - ### reload

    public void reload()
    Reload the current page

  - ### hasBack

    public boolean hasBack()

    Indicates whether back is currently available

    ###### Returns

    true if back should work

  - ### hasForward

    public boolean hasForward()

    Indicates whether forward is currently available

    ###### Returns

    true if forward should work

  - ### back

    public void back()
    Navigates back in the history

  - ### forward

    public void forward()
    Navigates forward in the history

  - ### clearHistory

    public void clearHistory()
    Clears navigation history

  - ### isPinchToZoomEnabled

    public boolean isPinchToZoomEnabled()

    This method is unreliable and is only here for consistency with setPinchToZoomEnabled, it will not return whether the platform supports pinch since this is very hard to detect properly.

    ###### Returns

    the last value for setPinchToZoomEnabled

  - ### setPinchToZoomEnabled

    public void setPinchToZoomEnabled(boolean e)

    Some platforms require that you enable pinch to zoom explicitly. This method has no effect if pinch to zoom isn't supported by the platform

    ###### Parameters

    - `e`: true to enable pinch to zoom, false to disable it

  - ### isNativeScrollingEnabled

    public boolean isNativeScrollingEnabled()

    This method is unreliable and is only here for consistency with setNativeScrollingEnabled.

    ###### Returns

    the last value for setNativeScrollingEnabled

  - ### setNativeScrollingEnabled

    public void setNativeScrollingEnabled(boolean b)

    This flag allows disabling the native browser scrolling on platforms that support it

    ###### Parameters

    - `b`: true to enable native scrolling, notice that non-native scrolling might be problematic

  - ### setPage

    public void setPage(String html, String baseUrl)

    Shows the given HTML in the native viewer

    ###### Parameters

    - `html`: HTML web page

    - `baseUrl`: base URL to associate with the HTML

  - ### addWebEventListener

    public void addWebEventListener(String type, ActionListener listener)

    Adds a listener to the given event type name, event type names are platform specific but some must be fired for all platforms and will invoke the action listener when the appropriate event loads

    ###### Parameters

    - `type`: platform specific but must support: onStart, onLoad, onError

    - `listener`: callback for the event

  - ### removeWebEventListener

    public void removeWebEventListener(String type, ActionListener listener)

    Removes the listener, see addWebEventListener for details

    ###### Parameters

    - `type`: see addWebEventListener for details

    - `listener`: see addWebEventListener for details

  - ### stop

    public void stop()
    Cancel the loading of the current page

  - ### destroy

    public void destroy()
    Release native resources of this Browser Component

  - ### fireWebEvent

    public void fireWebEvent(String type, ActionEvent ev)

    Used internally by the implementation to fire an event from the native browser widget

    ###### Parameters

    - `type`: the type of the event

    - `ev`: the event

  - ### execute

    public void execute(String javaScript)

    Executes the given JavaScript string within the current context

    ###### Parameters

    - `javaScript`: the JavaScript string

  - ### execute

    public void execute(String js, java.lang.Object[] params)

    Executes given javascript string within current context.

    ###### Parameters

    - `js`: The javascript to execute.

    - `params`: @param params Parameters to inject into the javascript expression. The expression should contain placeholders of the form ${0 }, ${1 }, etc... to be replaced. See `java.lang.Object...)` for more information about injected parameters. by parameters.

  - ### executeAndReturnString

    public String executeAndReturnString(String javaScript)

    Executes the given JavaScript and returns a result string from the underlying platform where applicable.

    Note: Some platforms use `Display#invokeAndBlock(java.lang.Runnable)` inside this method which is very costly. Try to avoid this synchronous method, and prefer to use one of the asynchronous versions. E.g. `com.codename1.util.SuccessCallback)`

    ###### Parameters

    - `javaScript`: the JavaScript code to execute

    ###### Returns

    the string returned from the Javascript call

  - ### executeAndReturnString

    public String executeAndReturnString(String javaScript, java.lang.Object[] params)

    Executes the given javascript and returns the result string from the underlying platform.

    Note: Some platforms use `Display#invokeAndBlock(java.lang.Runnable)` inside this method which is very costly. Try to avoid this synchronous method, and prefer to use one of the asynchronous versions. E.g. `com.codename1.util.SuccessCallback)`

    ###### Parameters

    - `javaScript`: The javascript to execute.

    - `params`: Parameters to inject into the javascript expression. The expression should contain placeholders of the form ${0 }, ${1 }, etc... to be replaced. See `java.lang.Object...)` for more information about injected parameters.

    ###### Returns

    The result as a string.

    ###### Since

    5.0

  - ### createJSProxy

    public BrowserComponent.JSProxy createJSProxy(String javascriptExpression)
    Creates a proxy for a Javascript object that makes it easier to call methods, retrieve, and manipulate properties on the object.

  - ### execute

    public void execute(String js, SuccessCallback<BrowserComponent.JSRef> callback)

    Asynchronously executes the provided javascript expression. The expression may provide a callback which you can call inside the expression directly.

    Example

    Getting the window object.

        `bc.execute("callback.onSuccess(window)", value -> {
        System.out.println("value="+value+"; type="+value.getJSType());
        // value=[object Window]; type=OBJECT`);
        }

    Getting an Integer

        `bc.execute("callback.onSuccess(1+2)", value -> {
        System.out.println("value="+value.getInt()+"; type="+value.getJSType());
        // value=3; type=NUMBER`);
        }

    Getting a String

        `bc.execute("callback.onSuccess('hello world')",value -> {
        System.out.println("value="+value+"; type="+value.getJSType());
        // value=hello world; type=STRING`
        );
        }

    After a Javascript Timeout

    Since this call is asynchronous, the javascript code can wait to call the callback to any time in the future - e.g. after a timeout, after an ajax response, in some event handler, etc.. The CN1 UI will not be blocked, the provided callback will be called at the appropriate time on the EDT.

        `bc.execute("setTimeout(function(){callback.onSuccess('hello world')`, 1500)",
        value -> {
        System.out.println("value="+value+"; type="+value.getJSType());
        // value=hello world; type=STRING
        }
        );
        }

    NOTE: The callback can only be called once, so you shouldn't use this method to register a callback with an event listener that will be called repeatedly. If you want to register a Java callback with a Javascript event, you should use the `com.codename1.util.Callback)` method instead.

    ###### Parameters

    - `js`: The javascript expression. If you want to receive any result from this expression, the expression itself must include a call to callback.onSuccess(value).

    - `callback`: The callback. You should call this directly from Javascript. You can call either `callback.onSuccess(value)` or `callback.onError(message,code)`.

  - ### execute

    public void execute(int timeout, String js, SuccessCallback<BrowserComponent.JSRef> callback)

    Execute javascript with a timeout. If timeout is reached before callback is run, then the callback's onError method is run (if callback is a Callback). If callback isn't a Callback (i.e. has no onError(), then this will log an error, and call the onSucess method with a null arg.

    ###### Parameters

    - `js`: The javascript to execute

    - `timeout`: The timeout in milliseconds.

    - `callback`: The callback

  - ### execute

    public void execute(int timeout, String js, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)

    Executes Javascript expression.

    ###### Parameters

    - `timeout`: The timeout in ms

    - `js`: The javascript expression to execute.

    - `params`: @param params Parameters to inject into the javascript expression. The expression should contain placeholders of the form ${0 }, ${1 }, etc... to be replaced. See `java.lang.Object...)` for more information about injected parameters. by parameters.

    - `callback`: Callback to call when complete.

  - ### execute

    public void execute(String js, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)

    Executes Javascript expression.

    ###### Parameters

    - `js`: The javascript expression to execute.

    - `params`: @param params Parameters to inject into the javascript expression. The expression should contain placeholders of the form ${0 }, ${1 }, etc... to be replaced. See `java.lang.Object...)` for more information about injected parameters. by parameters.

    - `callback`: Callback to call when complete.

  - ### addJSCallback

    public void addJSCallback(String installJs, SuccessCallback<BrowserComponent.JSRef> callback)

    Registers a Java method as a callback in javascript. The callback argument can be referenced inside the javascript expression so that it can be fired when certain events occur.

    Examples

    Register a Callback to be called whenever a button is clicked

        `bc.addJSCallback("someButton.addEventListener('click', function(){callback.onSuccess('hello world')`)", new Callback() {
        public void onSucess(JSRef value) {
        System.out.println("Received click: "+value);
        }
        });
        }

    ###### Parameters

    - `installJs`

    - `callback`

  - ### addJSCallback

    public void addJSCallback(String installJs, java.lang.Object[] params, SuccessCallback<BrowserComponent.JSRef> callback)

    Registers Java method as a callback in Javascript. The callback argument can be referenced inside the javascript expression so that it can be fired when certain events occur.

    ###### Parameters

    - `installJs`: The javascript expression. to run.

    - `params`: @param params Parameters to inject into the javascript expression. The expression should contain placeholders of the form ${0 }, ${1 }, etc... to be replaced. See `java.lang.Object...)` for more information about injected parameters. by parameters.

    - `callback`: The callback to call on completion.

  - ### removeJSCallback

    public void removeJSCallback(Callback<BrowserComponent.JSRef> callback)

    Removes a JS callback that was added via the `com.codename1.util.SuccessCallback)` method.

    Note: This won't unregister any callbacks from the Javascript environment. You'll need to perform your own additional cleanup in Javascript if this callback is registered in any event handlers.

    ###### Parameters

    - `callback`: The callback to remove.

  - ### removeJSCallback

    public void removeJSCallback(SuccessCallback<BrowserComponent.JSRef> callback)

  - ### executeAndWait

    public BrowserComponent.JSRef executeAndWait(int timeout, String js, java.lang.Object... params)

    This uses invokeAndBlock to wait for the result of the given javascript expression.

    ###### Parameters

    - `timeout`: Timeout in milliseconds.

    - `js`: The javascript expression.

    - `params`: Parameters to inject in the expression. See `java.lang.Object...)` for details.

    ###### Returns

    The result.

  - ### executeAndWait

    public BrowserComponent.JSRef executeAndWait(String js, java.lang.Object... params)

    This uses invokeAndBlock to wait for the result of the given javascript expression.

    ###### Parameters

    - `js`: The javascript expression.

    - `params`: Parameters to inject in the expression. See `java.lang.Object...)` for details.

    ###### Returns

    The result.

  - ### executeAndWait

    public BrowserComponent.JSRef executeAndWait(String js)

    This uses invokeAndBlock to wait for the result of the given javascript expression. It is extremely important that the js expression calls either `callback.onSuccess(value)` or `literalcallback.onError(message, code)` at some point, or this method will never return.

    `#executeAndWait(java.lang.String)` vs `#executeAndReturnString(java.lang.String)`

    `#executeAndReturnString(java.lang.String)` is also blocking, but it uses javascript eval to return the value of the expression. Therefore it can't return the result of any asynchronous operations.

    `#executeAndWait(java.lang.String)` is built directly on top of `com.codename1.util.SuccessCallback)` which is fully asynchronous, and allows you to specify where and when you call the callback within the javascript code. This means that you must explicitly call either `callback.onSuccess(value)` or `literalcallback.onError(message, code)` at some point in the Javascript expression - or the method will block indefinitely.

    ###### Parameters

    - `js`: The javascript expression to execute. You must call `callback.onSuccess(value)` with the result that you want to have returned.

    ###### Returns

    The result that is returned from javascript when it calls `callback.onSuccess(value)`

  - ### executeAndWait

    public BrowserComponent.JSRef executeAndWait(int timeout, String js)

    This uses invokeAndBlock to wait for the result of the given javascript expression. It is extremely important that the js expression calls either `callback.onSuccess(value)` or `literalcallback.onError(message, code)` at some point, or this method will never return.

    `#executeAndWait(java.lang.String)` vs `#executeAndReturnString(java.lang.String)`

    `#executeAndReturnString(java.lang.String)` is also blocking, but it uses javascript eval to return the value of the expression. Therefore it can't return the result of any asynchronous operations.

    `#executeAndWait(java.lang.String)` is built directly on top of `com.codename1.util.SuccessCallback)` which is fully asynchronous, and allows you to specify where and when you call the callback within the javascript code. This means that you must explicitly call either `callback.onSuccess(value)` or `literalcallback.onError(message, code)` at some point in the Javascript expression - or the method will block indefinitely.

    ###### Parameters

    - `timeout`: Timeout in ms

    - `js`: The javascript expression to execute. You must call `callback.onSuccess(value)` with the result that you want to have returned.

    ###### Returns

    The result that is returned from javascript when it calls `callback.onSuccess(value)`

  - ### exposeInJavaScript

    public void exposeInJavaScript(java.lang.Object o, String name)

    Allows exposing the given object to JavaScript code so the JavaScript code can invoke methods and access fields on the given object. Notice that on RIM devices which don't support reflection this object must implement the propriatery Scriptable interface http://www.blackberry.com/developers/docs/5.0.0api/net/rim/device/api/script/Scriptable.html

    ###### Parameters

    - `o`: the object to invoke, notice all public fields and methods would be exposed to JavaScript

    - `name`: the name to expose within JavaScript

    ###### Deprecated

  - ### putClientProperty

    public void putClientProperty(String key, java.lang.Object value)

    Sets a client property on this component. BrowserComponent supports several special client properties that control platform-specific behavior.

    ###### HTML5/JavaScript Port Client Properties

    - `HTML5Peer.removeOnDeinitialize` (Boolean): Controls whether the underlying iframe is removed from the DOM when the component is deinitialized.

      When a Dialog is shown, the parent Form is deinitialized, which normally causes BrowserComponent's iframe to be removed from the DOM. When the Dialog is dismissed, the Form is re-shown but the iframe must be recreated from scratch, losing all JavaScript state (Monaco editor content, event listeners, etc.).

      Setting this to `Boolean.FALSE` preserves the iframe in the DOM across deinitialization cycles, which is essential for:

      - WebRTC connections that break when removed from DOM
      - Editors and interactive components that need to preserve state
      - Any app that shows dialogs over a BrowserComponent

      Example:

          BrowserComponent browser = new BrowserComponent();
          browser.putClientProperty("HTML5Peer.removeOnDeinitialize", Boolean.FALSE);

    - `BrowserComponent.firebug` (Boolean): Enables debug mode with Firebug console integration (development only).

    Overrides:
      `putClientProperty` in class `Component`
    Parameters:
      `key` - the client property key
      `value` - the client property value

  - ### isDebugMode

    public boolean isDebugMode()

    Indicates if debug mode is set (might have no effect though)

    ###### Returns

    true if debug mode was activated

  - ### setDebugMode

    public void setDebugMode(boolean mode)

    Toggles debug mode for the browser component which helps detect coding errors in the JavaScript bridge logic

    ###### Parameters

    - `mode`: true to debug false otherwise, this might have no effect in some platforms