https://www.msaanetwork.com/wp-content/mu-plugins//da-browser-features.js?ver=0.002

1+function() {
2'use strict';
3var root = document.documentElement;
4root.removeAttribute('no-feature-javascript');
5root.setAttribute('feature-javascript', '');
6
7('ontouchstart' in window)
8? root.setAttribute('feature-touchevents', '')
9: root.setAttribute('no-feature-touchevents', '');
10
11var supportsPassive = false;
12try {
13  var opts = Object.defineProperty({}, 'passive', {
14    get: function() {
15      supportsPassive = true;
16    }
17  });
18  window.addEventListener("testPassive", null, opts);
19  window.removeEventListener("testPassive", null, opts);
20} catch (e) {}
21
22supportsPassive
23? root.setAttribute('feature-passivescroll', '')
24: root.setAttribute('no-feature-passivescroll', '');
25
26window.dab_browser_feature = function(feature) {
27    return root.hasAttribute('feature-' + feature);
28};
29window.dab_no_browser_feature = function(feature) {
30    return root.hasAttribute('no-feature-' + feature);
31};
32}();