javascript 回叫功能2

Posted 2021-05-04

// Declare calculating functions

let add = function(a, b) {
  return a + b
};

let divide = function(a, b) {
  return a / b;
};

let subtract = function(a,b) {
  return a - b;
}

// declare function to recieve args to to pass to callback function

let calcFunc = function(num1, num2, callback) {
  return callback(num1, num2);
};


console.log(calcFunc(23, 89, subtract));// specify args + callback function name