js-short-circuiting-or.js

// METHOD 1: Using if/else statements
let requestAnimFrame = null;

if (window.requestAnimationFrame) {
  requestAnimFrame = window.requestAnimationFrame;
}

else if (window.webkitRequestAnimationFrame) {
  requestAnimFrame = window.webkitRequestAnimationFrame;
}

else if (window.mozRequestAnimationFrame) {
  requestAnimFrame = window.mozRequestAnimationFrame;
}

// METHOD 2: Using short-circuiting
const requestAnimFrame2 = (
  window.requestAnimationFrame ||
  window.webkitRequestAnimationFrame ||
  window.mozRequestAnimationFrame ||
  null
);