asciinema.org/app/assets/javascripts/application.js

// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
//= require base
//= require jquery_ujs
//= require jquery.timeago
//= require persona

$(function() {
  $('abbr.timeago').timeago();

  $("input[data-behavior=auto-select]").click(function() {
    this.select();
  });

  $('input[data-behavior=focus]:first').focus();
});