A bunch of tests to see if the user has a touch device

touch_tests.js

function test_suite () {
  window.is_touch_device = 'ontouchstart' in window || navigator.maxTouchPoints

  window.is_mobile_browser = false;
  (function (a, b) { if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4)))window.is_mobile_browser = true })(navigator.userAgent || navigator.vendor || window.opera, 'http://detectmobilebrowser.com/mobile')
  if (!window.is_mobile_browser && window.is_touch_device) { window.is_ms_surface = true } else { window.is_ms_surface = false }

  console.log('window.is_ms_surface', window.is_ms_surface)
  console.log('window.is_mobile_browser', window.is_mobile_browser)
  console.log('ontouchstart', navigator.userAgent)
  console.log('navigator.userAgent', 'ontouchstart' in window || 'ontouchstart' in document || (window && window.navigator && window.navigator.maxTouchPoints > 0))

  function is_touch_device2 () {
    return 'ontouchstart' in window || // works on most browsers
  'onmsgesturechange' in window // works on IE10 with some false positives
  }

  console.log('is_touch_device2', is_touch_device2)

  function is_touch_device4 () {
    var prefixes = ' -webkit- -moz- -o- -ms- '.split(' ')
    var mq = function (query) {
      return window.matchMedia(query).matches
    }
    if (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
      return true
    }
    // include the 'heartz' as a way to have a non matching MQ to help terminate the join
    // https://git.io/vznFH
    var query = ['(', prefixes.join('touch-enabled),('), 'heartz', ')'].join('')
    return mq(query)
  }
  console.log('is_touch_device4', is_touch_device4())

  console.log('coarse', window.matchMedia('(pointer: coarse)').matches)

  if (window.addEventListener) {
    var once = false
    window.addEventListener('touchstart', function () {
      if (!once) {
        once = true
        console.log('event listener for touchstart TRUE')
        // Do what you need for touch-screens only
      }
    })
  }

  function detectTouchSupport () {
    var msGesture = window.navigator && window.navigator.msPointerEnabled && window.MSGesture
    var touchSupport = (('ontouchstart' in window) || msGesture || window.DocumentTouch && document instanceof window.DocumentTouch)
    if (touchSupport) {
      $('html').addClass('ci_touch')
    } else {
      $('html').addClass('ci_no_touch')
    }
  }

  console.log('detectTouchSupport', detectTouchSupport())
}

test_suite()