useLock.js 1.9 KB

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  1. "use strict";
  2. var _typeof = require("@babel/runtime/helpers/typeof");
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.default = useLock;
  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. * Locker return cached mark.
  12. * If set to `true`, will return `true` in a short time even if set `false`.
  13. * If set to `false` and then set to `true`, will change to `true`.
  14. * And after time duration, it will back to `null` automatically.
  15. */
  16. function useLock() {
  17. var duration = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 250;
  18. var lockRef = React.useRef(null);
  19. var timeoutRef = React.useRef(null);
  20. // Clean up
  21. React.useEffect(function () {
  22. return function () {
  23. window.clearTimeout(timeoutRef.current);
  24. };
  25. }, []);
  26. function doLock(locked) {
  27. if (locked || lockRef.current === null) {
  28. lockRef.current = locked;
  29. }
  30. window.clearTimeout(timeoutRef.current);
  31. timeoutRef.current = window.setTimeout(function () {
  32. lockRef.current = null;
  33. }, duration);
  34. }
  35. return [function () {
  36. return lockRef.current;
  37. }, doLock];
  38. }