makeEl-3.js

function makeElement(type, props, text) {
 const el = document.createElement(type);
 
 Object.keys(props).forEach(prop => {
  el[prop] = props[prop];
 });
 
 const textNode = document.createTextNode(text);
 
 el.appendChild(textNode);
 
 return el;
}

const h1 = (...args) => makeElement(`h1`, ...args);


// and then ...
document.body.appendChild(
 h1(
   { className: `title` },
   `Hello, world.`,
 )
);