logicalOrOperator.js

console.group('Logical OR assignment (||=)');

const a = { duration: 50, title: '' };

a.duration ||= 10;
console.log(a.duration);

a.title ||= 'title is empty.';
console.log(a.title);

console.groupEnd();

/*
Console:

Logical OR assignment (||=)
  50
  title is empty.
*/

// Other usefull example can be:
document.getElementById('lyrics').textContent ||= 'No lyrics.'