Basic example of how the nullish coalescing operator works

nullish_coalescing_operator_basic_example.js

const i_am_null = null;
const i_am_undefined = undefined;
const i_am_non_null = 'I have value !'

const value_1 = i_am_null ?? 'default value';
console.log(value_1); // Expected output: "default value"

const value_2 = i_am_undefined ?? 'another default value';
console.log(value_2); // Expected output: "another default value"

const value_3 = i_am_non_null ?? 'another value';
console.log(value_3); // Expected output: "I have value !"