JavaScript snippet to show random kitten image in console

kitten_in_console.js

(function(url) {
  // Create a new `Image` instance
  var image = new Image();

  image.onload = function() {
    // Inside here we already have the dimensions of the loaded image
    var style = [
      // Hacky way of forcing image's viewport using `font-size` and `line-height`
      'font-size: 1px;',
      'line-height: ' + this.height + 'px;',

      // Hacky way of forcing a middle/center anchor point for the image
      'padding: ' + this.height * .5 + 'px ' + this.width * .5 + 'px;',

      // Set image dimensions
      'background-size: ' + this.width + 'px ' + this.height + 'px;',

      // Set image URL
      'background: url('+ url +');'
     ].join(' ');

     console.log('%c', style);
  };

  // Actually loads the image
  image.src = url;
})('http://placekitten.com/' + (200 + Math.round(Math.random()*200)) + '/' + (200 + Math.round(Math.random()*200)));