overscroll-behavior.js 3.0 KB

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  1. "use strict";
  2. 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; }
  3. function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  4. function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  5. function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  6. function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  7. function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  8. function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _defaults(subClass, superClass); }
  9. 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; }
  10. var Declaration = require('../declaration');
  11. var OverscrollBehavior = /*#__PURE__*/function (_Declaration) {
  12. _inheritsLoose(OverscrollBehavior, _Declaration);
  13. var _super = _createSuper(OverscrollBehavior);
  14. function OverscrollBehavior() {
  15. return _Declaration.apply(this, arguments) || this;
  16. }
  17. var _proto = OverscrollBehavior.prototype;
  18. /**
  19. * Change property name for IE
  20. */
  21. _proto.prefixed = function prefixed(prop, prefix) {
  22. return prefix + 'scroll-chaining';
  23. }
  24. /**
  25. * Return property name by spec
  26. */
  27. ;
  28. _proto.normalize = function normalize() {
  29. return 'overscroll-behavior';
  30. }
  31. /**
  32. * Change value for IE
  33. */
  34. ;
  35. _proto.set = function set(decl, prefix) {
  36. if (decl.value === 'auto') {
  37. decl.value = 'chained';
  38. } else if (decl.value === 'none' || decl.value === 'contain') {
  39. decl.value = 'none';
  40. }
  41. return _Declaration.prototype.set.call(this, decl, prefix);
  42. };
  43. return OverscrollBehavior;
  44. }(Declaration);
  45. _defineProperty(OverscrollBehavior, "names", ['overscroll-behavior', 'scroll-chaining']);
  46. module.exports = OverscrollBehavior;