Target page sets: var foo = "bar";
Target page sets: var obj = {A: 1};
Target page sets: function func () {console.log ('Hi');}
unsafeWindow.foo = "Apple";
var gmObject = {X: "123"};
function gmFunc () {
console.log ("Lorem ipsum");
//-- Can use GM_ functions in here! :)
<button id="helloBtn">Say "Hello".</button>
var simpleGlobalVar = "A simple, global var in the page scope.";
var globalObject = {Letter: "A", Number: 2};
function simpleFunction () {
console.log ("The target page's simpleFunction was called.");
}
var sayHello = function() {
console.log ('Hello.');
}
document.getElementById ('helloBtn').addEventListener ('click', function () {
sayHello ();
} );
// ==UserScript==
// @name _Demonstrate accessing target-page variables with @grant values set
// @include http://fiddle.jshell.net/sepwL7n6/*/show/
// @require http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @grant GM_addStyle
// ==/UserScript==
console.log ("*** Greasemonkey script start.");
$("body").append ('<div id="gmArea">Added by Greasemonkey:<p></p></div>');
$("#gmArea > p:first").append ('<button id="gmShow">Access select target-page variables and functions</button>');
$("#gmArea > p:first").append ('<button id="gmChange">Change javascript things in the target-page scope.</button>');
$("#gmShow").click ( function () {
//-- Access things from the target-page scope:
console.log ("----------------");
console.log ("==> simpleGlobalVar is: ", unsafeWindow.simpleGlobalVar);
console.log ("==> globalObject is: ", unsafeWindow.globalObject);
console.log ("==> Calling target's simpleFunction():");
unsafeWindow.simpleFunction ();
//-- WARNING! This next technique is not robust, but works in some cases.
console.log ("==> Calling target's button's click().");
unsafeWindow.document.getElementById ('helloBtn').click ();
} );
$("#gmChange").click ( function () {
this.disabled = true; //-- Can only click once.
unsafeWindow.simpleGlobalVar = "Simple var... Intercepted by GM!";
unsafeWindow.globalObject = cloneInto (gmObject, unsafeWindow);
unsafeWindow.sayHello = exportFunction (sayHello, unsafeWindow);
console.log ("==> Target page objects were changed.");
} );
var gmMessageStr = "Function... Intercepted by GM, but also can use GM_ functions!";
function sayHello () {
sayHello.K = (sayHello.K || 0) + 1;
console.log (gmMessageStr);
GM_addStyle ('body {background: ' + (sayHello.K % 2 ? "lime" : "white") + ';}');
}
var gmObject = {message: "Object overridden by GM."};