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//   http://www.apache.org/licenses/LICENSE-2.0
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package org.openqa.selenium;

/**
 * Indicates that a driver can execute JavaScript, providing access to the mechanism to do so.
 *
 * <p>
 * Because of cross domain policies browsers enforce your script execution may fail unexpectedly
 * and without adequate error messaging. This is particularly pertinent when creating your own
 * XHR request or when trying to access another frame. Most times when troubleshooting failure it's
 * best to view the browser's console after executing the WebDriver request.
 */
public interface JavascriptExecutor {
  /**
   * Executes JavaScript in the context of the currently selected frame or window. The script
   * fragment provided will be executed as the body of an anonymous function.
   *
   * <p>
   * Within the script, use <code>document</code> to refer to the current document. Note that local
   * variables will not be available once the script has finished executing, though global variables
   * will persist.
   *
   * <p>
   * If the script has a return value (i.e. if the script contains a <code>return</code> statement),
   * then the following steps will be taken:
   *
   * <ul>
   * <li>For an HTML element, this method returns a WebElement</li>
   * <li>For a decimal, a Double is returned</li>
   * <li>For a non-decimal number, a Long is returned</li>
   * <li>For a boolean, a Boolean is returned</li>
   * <li>For all other cases, a String is returned.</li>
   * <li>For an array, return a List&lt;Object&gt; with each object following the rules above. We
   * support nested lists.</li>
   * <li>Unless the value is null or there is no return value, in which null is returned</li>
   * </ul>
   *
   * <p>
   * Arguments must be a number, a boolean, a String, WebElement, or a List of any combination of
   * the above. An exception will be thrown if the arguments do not meet these criteria. The
   * arguments will be made available to the JavaScript via the "arguments" magic variable, as if
   * the function were called via "Function.apply"
   *
   * @param script The JavaScript to execute
   * @param args The arguments to the script. May be empty
   * @return One of Boolean, Long, String, List or WebElement. Or null.
   */
  Object executeScript(String script, Object... args);

  /**
   * Execute an asynchronous piece of JavaScript in the context of the currently selected frame or
   * window. Unlike executing {@link #executeScript(String, Object...) synchronous JavaScript},
   * scripts executed with this method must explicitly signal they are finished by invoking the
   * provided callback. This callback is always injected into the executed function as the last
   * argument.
   *
   * <p>
   * The first argument passed to the callback function will be used as the script's result. This
   * value will be handled as follows:
   *
   * <ul>
   * <li>For an HTML element, this method returns a WebElement</li>
   * <li>For a number, a Long is returned</li>
   * <li>For a boolean, a Boolean is returned</li>
   * <li>For all other cases, a String is returned.</li>
   * <li>For an array, return a List&lt;Object&gt; with each object following the rules above. We
   * support nested lists.</li>
   * <li>Unless the value is null or there is no return value, in which null is returned</li>
   * </ul>
   *
   * <p>
   * The default timeout for a script to be executed is 0ms. In most cases, including the examples
   * below, one must set the script timeout
   * {@link WebDriver.Timeouts#setScriptTimeout(long, java.util.concurrent.TimeUnit)}  beforehand
   * to a value sufficiently large enough.
   *
   *
   * <p>
   * Example #1: Performing a sleep in the browser under test. <pre>{@code
   *   long start = System.currentTimeMillis();
   *   ((JavascriptExecutor) driver).executeAsyncScript(
   *       "window.setTimeout(arguments[arguments.length - 1], 500);");
   *   System.out.println(
   *       "Elapsed time: " + System.currentTimeMillis() - start);
   * }</pre>
   *
   * <p>
   * Example #2: Synchronizing a test with an AJAX application: <pre>{@code
   *   WebElement composeButton = driver.findElement(By.id("compose-button"));
   *   composeButton.click();
   *   ((JavascriptExecutor) driver).executeAsyncScript(
   *       "var callback = arguments[arguments.length - 1];" +
   *       "mailClient.getComposeWindowWidget().onload(callback);");
   *   driver.switchTo().frame("composeWidget");
   *   driver.findElement(By.id("to")).sendKeys("bog@example.com");
   * }</pre>
   *
   * <p>
   * Example #3: Injecting a XMLHttpRequest and waiting for the result: <pre>{@code
   *   Object response = ((JavascriptExecutor) driver).executeAsyncScript(
   *       "var callback = arguments[arguments.length - 1];" +
   *       "var xhr = new XMLHttpRequest();" +
   *       "xhr.open('GET', '/resource/data.json', true);" +
   *       "xhr.onreadystatechange = function() {" +
   *       "  if (xhr.readyState == 4) {" +
   *       "    callback(xhr.responseText);" +
   *       "  }" +
   *       "};" +
   *       "xhr.send();");
   *   JsonObject json = new JsonParser().parse((String) response);
   *   assertEquals("cheese", json.get("food").getAsString());
   * }</pre>
   *
   * <p>
   * Script arguments must be a number, a boolean, a String, WebElement, or a List of any
   * combination of the above. An exception will be thrown if the arguments do not meet these
   * criteria. The arguments will be made available to the JavaScript via the "arguments"
   * variable.
   *
   *
   * @param script The JavaScript to execute.
   * @param args The arguments to the script. May be empty.
   * @return One of Boolean, Long, String, List, WebElement, or null.
   * @see WebDriver.Timeouts#setScriptTimeout(long, java.util.concurrent.TimeUnit)
   */
  Object executeAsyncScript(String script, Object... args);
}

@@ -2943,32 +2943,40 @@
 f Boolean, Long,
+ Double,
  String, List or

Add Double to return types list