f8ab9466d3
We were using `Object.create` to setup the prototype chain at the start of the class definition, which lead to #7771. I was a bit worried about a speed hit, but it seems everyone optimizes the two patterns the same way. https://jsbench.github.io/#f9fca52407643d96458a35763b201215 Fixes #7771.
41 lines
2.1 KiB
JavaScript
41 lines
2.1 KiB
JavaScript
function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } _setPrototypeOf(subClass.prototype, superClass && superClass.prototype); if (superClass) _setPrototypeOf(subClass, superClass); }
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function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
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function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
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function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
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function _getPrototypeOf(o) { _getPrototypeOf = Object.getPrototypeOf || function _getPrototypeOf(o) { return o.__proto__; }; return _getPrototypeOf(o); }
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function _instanceof(left, right) { if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) { return right[Symbol.hasInstance](left); } else { return left instanceof right; } }
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function _classCallCheck(instance, Constructor) { if (!_instanceof(instance, Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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var B = function B() {
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"use strict";
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_classCallCheck(this, B);
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};
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var A =
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/*#__PURE__*/
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function (_B) {
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"use strict";
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function A(track) {
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var _this;
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_classCallCheck(this, A);
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if (track !== undefined) _this = _possibleConstructorReturn(this, _getPrototypeOf(A).call(this, track));else _this = _possibleConstructorReturn(this, _getPrototypeOf(A).call(this));
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return _possibleConstructorReturn(_this);
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}
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_inherits(A, _B);
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return A;
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}(B);
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