useMemoCallback.js 1.6 KB

1234567891011121314151617181920212223242526
  1. "use strict";
  2. var _typeof = require("@babel/runtime/helpers/typeof");
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.default = useMemoCallback;
  7. var React = _interopRequireWildcard(require("react"));
  8. function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
  9. function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
  10. /**
  11. * Cache callback function that always return same ref instead.
  12. * This is used for context optimization.
  13. */
  14. function useMemoCallback(func) {
  15. var funRef = React.useRef(func);
  16. funRef.current = func;
  17. var callback = React.useCallback(function () {
  18. var _funRef$current;
  19. for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
  20. args[_key] = arguments[_key];
  21. }
  22. return (_funRef$current = funRef.current) === null || _funRef$current === void 0 ? void 0 : _funRef$current.call.apply(_funRef$current, [funRef].concat(args));
  23. }, []);
  24. return func ? callback : undefined;
  25. }