overscroll-behavior.js 1.8 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 _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _defaults(subClass, superClass); }
  4. 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; }
  5. var Declaration = require('../declaration');
  6. var OverscrollBehavior =
  7. /*#__PURE__*/
  8. function (_Declaration) {
  9. _inheritsLoose(OverscrollBehavior, _Declaration);
  10. function OverscrollBehavior() {
  11. return _Declaration.apply(this, arguments) || this;
  12. }
  13. var _proto = OverscrollBehavior.prototype;
  14. /**
  15. * Change property name for IE
  16. */
  17. _proto.prefixed = function prefixed(prop, prefix) {
  18. return prefix + 'scroll-chaining';
  19. }
  20. /**
  21. * Return property name by spec
  22. */
  23. ;
  24. _proto.normalize = function normalize() {
  25. return 'overscroll-behavior';
  26. }
  27. /**
  28. * Change value for IE
  29. */
  30. ;
  31. _proto.set = function set(decl, prefix) {
  32. if (decl.value === 'auto') {
  33. decl.value = 'chained';
  34. } else if (decl.value === 'none' || decl.value === 'contain') {
  35. decl.value = 'none';
  36. }
  37. return _Declaration.prototype.set.call(this, decl, prefix);
  38. };
  39. return OverscrollBehavior;
  40. }(Declaration);
  41. _defineProperty(OverscrollBehavior, "names", ['overscroll-behavior', 'scroll-chaining']);
  42. module.exports = OverscrollBehavior;