JSFiddle - React, Tailwind, and code Playground

JavaScript

var x = [2, 3, 8];
var sums = [];
var sets = [];
function SubSets(read, queued)
{
	if( read.length == 4 || (read.length <= 4 && queued.length == 0) )
	{
        if( read.length > 0 ){
         var total = read.reduce(function(a,b){return a+b;},0);
         if(sums.indexOf(total)==-1){
          sums.push(total);
          sets.push(read.slice().sort());
         }
        }
	}
	else
	{
		SubSets(read.concat(queued[0]),queued.slice(1));
		SubSets(read,queued.slice(1));
	}
}
SubSets([],x);
console.log(sums.sort(function(a,b){return a-b;}));