JSFiddle - React, Tailwind, and code Playground
JavaScript
function *fib(){
var i=0,j=1;
while(true){
yield i;
var t=i;
i=j;
j+=t;
}
}
var g=fib();
console.log(g.next().value);//0
console.log(g.next().value);//1
console.log(g.next().value);//1