Tiny jQuery Starter

tinyquery.js

function $( selector, ctx = document ) {
  if ( !( this instanceof $ ) ) {
    return new $( selector, ctx );
  }
  
  return this.push( ...ctx.querySelectorAll( selector ) );    
}

$.prototype = {
  length: 0,
  splice: Array.prototype.splice,
  push: Array.prototype.push,
  each( fn ) {
    Array.prototype.forEach.call( this, ( e, i ) => {
      fn.call( e, i, e ) 
    });
    return this;
  },
  addClass( classname ) {
    return this.each( ( i, e ) => {
      e.classList.add( classname );
    });
  }
};