How do you split an array into array pairs in JavaScript? -

i want split array pairs of arrays

so var arr=[2,3,4,5,6,4,3,5,5]

would newarr =[[2,3],[4,5],[6,4],[3,5],[5]]

there's no pre-baked function that, here's simple solution:

var splitpairs = function(arr) {     var pairs = [];     (var i=0 ; i<arr.length ; i+=2) {         if (arr[i+1] !== undefined) {             pairs.push ([arr[i], arr[i+1]]);         } else {             pairs.push ([arr[i]]);         }     }     return pairs; };