Function in an object in JavaScript
Using symbols, functions can be added to objects and these functions will not participate in the looping. Let's try. Let's have an object:
let obj = {a: 1, b: 2, c: 3};
Let's create a symbol:
let sym = Symbol();
Write a function to an object with a key in the form of our symbol:
obj[sym] = function() {
console.log('!!!');
};
When iterating over the object, our function will not be iterated:
for (let key in obj) {
console.log(obj[key]); // 1, 2, 3
}
We get our function by passing our symbol (the same variable) as a key:
let func = obj[sym];
func();
We can shorten the code:
obj[sym]();
Add a function to the object that will display the current time. Call this function.
