routing.mjs 5.4 KB

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  1. /**
  2. * Provides a way to customize when activated routes get reused.
  3. */
  4. export class IonicRouteStrategy {
  5. /**
  6. * Whether the given route should detach for later reuse.
  7. */
  8. shouldDetach(_route) {
  9. return false;
  10. }
  11. /**
  12. * Returns `false`, meaning the route (and its subtree) is never reattached
  13. */
  14. shouldAttach(_route) {
  15. return false;
  16. }
  17. /**
  18. * A no-op; the route is never stored since this strategy never detaches routes for later re-use.
  19. */
  20. store(_route, _detachedTree) {
  21. return;
  22. }
  23. /**
  24. * Returns `null` because this strategy does not store routes for later re-use.
  25. */
  26. retrieve(_route) {
  27. return null;
  28. }
  29. /**
  30. * Determines if a route should be reused.
  31. * This strategy returns `true` when the future route config and
  32. * current route config are identical and all route parameters are identical.
  33. */
  34. shouldReuseRoute(future, curr) {
  35. if (future.routeConfig !== curr.routeConfig) {
  36. return false;
  37. }
  38. // checking router params
  39. const futureParams = future.params;
  40. const currentParams = curr.params;
  41. const keysA = Object.keys(futureParams);
  42. const keysB = Object.keys(currentParams);
  43. if (keysA.length !== keysB.length) {
  44. return false;
  45. }
  46. // Test for A's keys different from B.
  47. for (const key of keysA) {
  48. if (currentParams[key] !== futureParams[key]) {
  49. return false;
  50. }
  51. }
  52. return true;
  53. }
  54. }
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