length-1 v1.0.1

length-1

First negative index through Array

var getLengthMinus1 = require('./length-1');

// Arrays fixed
var arr = [1, 2, 3];
arr[-1]; // 3

// reusable tested functionality
Object.defineProperty(
  NodeList.prototype,
  -1,
  {get: getLengthMinus1}
);
document.querySelectorAll('#menu li')[-1];