JSFiddle - React, Tailwind, and code Playground
by dance2die
JavaScript 1.7
const arr = [1,1,2,2,2,3,3,3,3];
var uniqueInOrder = function (iterable)
{
return [].filter.call(iterable, (function (a, i) { return iterable[i - 1] !== a }));
}
console.log(uniqueInOrder(arr));