javascript.js

var items = [
  'amazon', 'github', 'html5', 'mastodon', 'reddit', 'soundcloud', 'tox', 'wechat', 'youtube',
  'dropbox', 'gitlab', 'instagram', 'paypal', 'rss', 'spotify', 'tumblr', 'whatsapp',
  'email', 'google_plus', 'linkedin', 'pdf', 'skype', 'stackoverflow', 'twitter', 'wikipedia',
  'facebook', 'google', 'lock', 'phone', 'slideshare', 'steam', 'vimeo', 'wire',
  'flickr', 'hackernews', 'mail', 'pinterest', 'snapchat', 'telegram', 'vk', 'wordpress'
];

var container = document.querySelector('.icons');
var range = document.querySelector('input[type="range"]');
var number = document.querySelector('input.rangeout');
range.addEventListener('input', function(e){
  number.value = parseInt(e.target.value);
  render(e.target.value);
});

number.addEventListener('input', function(e){
  range.value = parseInt(e.target.value);
  render(e.target.value);
});

var urls = items.map(item => 'tiny/' + item + '.svg');
var icons;
Promise.all(urls.map(url => fetch(url).then(res => res.text()))).then(all => {
  icons = all;
  render(range.value);
});

var render = function(radius = 15){
  console.log('Rendering!', icons);

  icons = icons.map(icon => {
    return icon.replace(/rx\=\"\d{0,2}\%/, 'rx="' + radius + '%"');
  });
  container.innerHTML = '<div>' + icons.join('</div><div>') + '</div>';
}