This code snippet is used in Default Parameters in ES6 JavaScript Tutorial for SFDC Stop

functiondefaultparameterses6.js

// * Default parameters in ES6 functions

// * Default values before ES6
// function add(a, b) {
//     b = b ? b : 2;
//     console.log(a+b);
// }

// * Default value using ES6 syntax
function add(a, b = 2) {
    console.log(a+b);
}

add(3);

// * Default value to an object being passed as a parameter using ES6 syntax
function personAge(age, { firstName = 'Richard', lastName = 'Hendricks' } = {}) {
    console.log(firstName + ' ' + lastName + ' is ' + age + ' years old');
}

personAge(20);