javascript - JavaScript：将参数传递给回调函数(JavaScript: Passing parameters to a callback function)

Question

I'm trying to pass some parameter to a function used as callback, how can I do that?

(我正在尝试将一些参数传递给用作回调的函数，该怎么做？)

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

function callbackTester (callback, param1, param2) {
    callback (param1, param2);
}

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

  ask by vitto translate from so

Answer 1

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

(如果您想要更一般的东西，可以使用arguments变量，如下所示：)

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)

(但是否则，您的示例可以正常工作（可以在测试器中使用arguments [0]代替回调）)