overscroll/es/utils/browser.js

scroll

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

export default (function () {
  if (navigator && navigator.userAgent) {
    var userAgent = navigator.userAgent.toLowerCase();
    var toArray = function toArray(some) {
      return !Array.isArray(some) ? [some] : some;
    };
    var regexps = {
      ie: [/rv:([\d.]+)\) like gecko/, /msie ([\d.]+)/],
      firefox: /firefox\/([\d.]+)/,
      chrome: /chrome\/([\d.]+)/,
      opera: /opera.([\d.]+)/,
      safari: /version\/([\d.]+).*safari/
    };
    return Object.entries(regexps).reduce(function (env, _ref) {
      var _ref2 = _slicedToArray(_ref, 2),
          key = _ref2[0],
          regexps = _ref2[1];

      toArray(regexps).map(function (regexp) {
        return userAgent.match(regexp);
      }).filter(function (s) {
        return s;
      }).forEach(function (s) {
        env[key] = parseFloat(s[1]);
      });
      return env;
    }, {});
  }
  return {};
})();