JavaScript: Passing parameters to a callback function

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If you want something slightly more general, you can use the arguments variable like so:

function tryMe(param1, param2) {
  alert(param1 + " and " + param2);
}

function callbackTester(callback) {
  callback(arguments[1], arguments[2]);
}

callbackTester(tryMe, "hello", "goodbye");

But otherwise, your example works fine (arguments[0] can be used in place of callback in the tester)

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