text: "use strict";
  
  function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
  
  function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _defaults(subClass, superClass); }
  
  function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
  
  var Declaration = require('../declaration');
  
  var OverscrollBehavior =
  /*#__PURE__*/
  function (_Declaration) {
    _inheritsLoose(OverscrollBehavior, _Declaration);
  
    function OverscrollBehavior() {
      return _Declaration.apply(this, arguments) || this;
    }
  
    var _proto = OverscrollBehavior.prototype;
  
    /**
     * Change property name for IE
     */
    _proto.prefixed = function prefixed(prop, prefix) {
      return prefix + 'scroll-chaining';
    }
    /**
     * Return property name by spec
     */
    ;
  
    _proto.normalize = function normalize() {
      return 'overscroll-behavior';
    }
    /**
     * Change value for IE
     */
    ;
  
    _proto.set = function set(decl, prefix) {
      if (decl.value === 'auto') {
        decl.value = 'chained';
      } else if (decl.value === 'none' || decl.value === 'contain') {
        decl.value = 'none';
      }
  
      return _Declaration.prototype.set.call(this, decl, prefix);
    };
  
    return OverscrollBehavior;
  }(Declaration);
  
  _defineProperty(OverscrollBehavior, "names", ['overscroll-behavior', 'scroll-chaining']);
  
  module.exports = OverscrollBehavior;