SOURCE

let name='hezi',age=12;
console.log(`hello,${name}`)

let message=tag`hello world , this name is ${name},age is ${age}`;
console.log(message);


function tag(literals,...substitutions){
  let result='';
  for(let i=0;i<substitutions.length;i++){
    result+=literals[i]+substitutions[i];
  }
  return result;
}
 

document.querySelector('#div1').innerHTML=message;

let color=["red","greed","blue"];
let iterators={
  createIterator:function(items){
    let i=0;
    return {
      next:function(){
    	return {
      		value:items[i++],done:i>=items.length
    		}
    	}
		};
  }
};
let iterat=iterators.createIterator(color);
console.log(iterat.next());

<div id='div1'>
  d
</div>