incremental updater

incremental-updater.js

var ms;
var runtime;
var i;
var total;
var diff;
var incr;
var prev = 0; 

function updater (target, rtime, msec) {
  if(target) {
	i = 0;
    total = target - (prev || 0);

    if(total === 0) return target;    
    
	console.time('updater');

    ms = msec || ms || 250;
    runtime = rtime || runtime || 2500;
    
    incr = total / (runtime/ms);
    console.log(total, incr, ms, runtime)
  }

  if (i + incr < total) {
    i += incr;
    return setTimeout(()=>{
      
      console.log(i + prev)
      updater();
      }, ms);
    ;
  }
console.timeEnd('updater')
prev += total;
  console.log("---------------------------------- done", i, prev)
}