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    HTMLIFrameElement.getCanGoBack()

    Non-standard
    This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.

    This API is available on Firefox OS for privileged or certified applications only.

    Summary

    The getCanGoBack method is used to know if it's possible to go back in the navigation history of the browser <iframe>.

    Syntax

    var instanceOfDOMRequest = instanceOfHTMLIframeElement.getCanGoBack();

    Return

    Returns a DOMRequest object to handle the request's success or error. If the request is successful, the request's result will be a boolean indicating if the history can be navigated backward (true) or not (false).

    Example

    var browser = document.querySelector("iframe[mozbrowser]");
    
    var request = browser.getCanGoBack();
    
    request.onsuccess = function () {
      if (this.result) {
        console.log("It's possible to navigate the history backward.");
      } else {
        console.log("It's not possible to navigate the history backward.");
      }
    }
    

    Specification

    Not part of any specification.

    See also

    Document Tags and Contributors

    Contributors to this page: kscarfone, teoli, ajaybhat, Jeremie
    Last updated by: teoli,
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