17

I get the following error when I tried building my application again:

ERROR in ../../../node_modules/@angular/cdk/a11y/typings/aria-describer/aria-describer.d.ts(8,42): error TS2307: Cannot find module '@angular/core

This error occurred while I was developing my angular application. I apparently got this whilst I was programming but I didn't notice it because the application simply just kept compiling whenever I made some changes. This error only started to prevented me from building the application this morning. Does anybody know what is going on here?

full error:

ERROR in ../../../node_modules/@angular/cdk/a11y/typings/aria-describer/aria-describer.d.ts(8,42): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/a11y/typings/focus-monitor/focus-monitor.d.ts(9,82): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/a11y/typings/focus-monitor/focus-monitor.d.ts(10,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/a11y/typings/focus-trap/focus-trap.d.ts(8,65): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/a11y/typings/key-manager/list-key-manager.d.ts(8,27): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/a11y/typings/key-manager/list-key-manager.d.ts(9,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/cdk/a11y/typings/live-announcer/live-announcer.d.ts(8,53): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/accordion/typings/accordion-item.d.ts(8,60): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/bidi/typings/dir.d.ts(8,59): error TS2307: Cannot find module '@angular/core'.




../../../node_modules/@angular/cdk/bidi/typings/directionality.d.ts(8,46): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/collections/typings/collection-viewer.d.ts(8,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/collections/typings/data-source.d.ts(8,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/collections/typings/selection.d.ts(8,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/cdk/collections/typings/unique-selection-dispatcher.d.ts(8,37): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/layout/typings/breakpoints-observer.d.ts(8,35): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/layout/typings/breakpoints-observer.d.ts(10,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/overlay/typings/keyboard/overlay-keyboard-dispatcher.d.ts(8,53): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-container.d.ts(8,53): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-directives.d.ts(9,126): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-module.d.ts(1,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-ref.d.ts(10,55): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-ref.d.ts(11,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/overlay/typings/overlay-ref.d.ts(12,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/cdk/overlay/typings/overlay.d.ts(8,76): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/position/connected-position-strategy.d.ts(9,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/position/connected-position-strategy.d.ts(12,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/overlay/typings/position/overlay-position-builder.d.ts(8,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/scroll/close-scroll-strategy.d.ts(8,24): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/scroll/reposition-scroll-strategy.d.ts(8,24): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/overlay/typings/scroll/scroll-strategy-options.d.ts(8,24): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/portal/typings/dom-portal-outlet.d.ts(8,99): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/portal/typings/portal-directives.d.ts(8,137): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/portal/typings/portal-injector.d.ts(8,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/portal/typings/portal.d.ts(8,100): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/scrolling/typings/scroll-dispatcher.d.ts(8,57): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/scrolling/typings/scroll-dispatcher.d.ts(10,30): error TS2307: Cannot find module 'rxjs/Subscription'.
../../../node_modules/@angular/cdk/scrolling/typings/scroll-dispatcher.d.ts(11,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/scrolling/typings/scrollable.d.ts(8,55): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/scrolling/typings/scrollable.d.ts(9,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/scrolling/typings/viewport-ruler.d.ts(8,45): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/scrolling/typings/viewport-ruler.d.ts(10,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/cdk/stepper/typings/step-label.d.ts(8,29): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/stepper/typings/stepper.d.ts(8,107): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/stepper/typings/stepper.d.ts(10,33): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/cdk/stepper/typings/stepper.d.ts(12,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/cdk/table/typings/cell.d.ts(8,41): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/table/typings/row.d.ts(8,112): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/table/typings/table.d.ts(8,139): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/cdk/table/typings/table.d.ts(11,33): error TS2307: Cannot find module 'rxjs/BehaviorSubject'.
../../../node_modules/@angular/cdk/table/typings/table.d.ts(13,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/autocomplete/typings/autocomplete-trigger.d.ts(10,100): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/autocomplete/typings/autocomplete-trigger.d.ts(11,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/autocomplete/typings/autocomplete-trigger.d.ts(14,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/autocomplete/typings/autocomplete.d.ts(8,119): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/button-toggle/typings/button-toggle.d.ts(10,91): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/button-toggle/typings/button-toggle.d.ts(11,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/button/typings/button.d.ts(10,39): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/checkbox/typings/checkbox-config.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/checkbox/typings/checkbox-required-validator.d.ts(8,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/checkbox/typings/checkbox-required-validator.d.ts(9,43): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/checkbox/typings/checkbox.d.ts(9,87): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/checkbox/typings/checkbox.d.ts(10,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/chips/typings/chip-input.d.ts(1,42): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/chips/typings/chip-list.d.ts(11,118): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/chips/typings/chip-list.d.ts(12,77): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/chips/typings/chip-list.d.ts(15,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/chips/typings/chip.d.ts(9,53): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/chips/typings/chip.d.ts(11,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/core/typings/common-behaviors/color.d.ts(9,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/common-behaviors/common-module.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/common-behaviors/error-state.d.ts(10,55): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/core/typings/common-behaviors/error-state.d.ts(11,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/core/typings/common-behaviors/initialized.d.ts(9,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/core/typings/datetime/date-adapter.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/datetime/date-adapter.d.ts(9,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/core/typings/datetime/date-adapter.d.ts(10,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/core/typings/datetime/date-formats.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/error/error-options.d.ts(1,57): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/core/typings/gestures/gesture-config.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/gestures/gesture-config.d.ts(9,37): error TS2307: Cannot find module '@angular/platform-browser'.
../../../node_modules/@angular/material/core/typings/label/label-options.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/line/line.d.ts(8,39): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/option/option.d.ts(1,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/core/typings/option/option.d.ts(2,106): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/ripple/ripple-renderer.d.ts(8,36): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/core/typings/ripple/ripple.d.ts(9,71): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/calendar-body.d.ts(8,30): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/calendar.d.ts(1,124): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/datepicker-input.d.ts(1,71): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/datepicker-input.d.ts(2,84): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/datepicker/typings/datepicker-intl.d.ts(1,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/datepicker/typings/datepicker-toggle.d.ts(1,90): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/datepicker.d.ts(10,101): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/datepicker.d.ts(13,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/datepicker/typings/month-view.d.ts(8,67): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/multi-year-view.d.ts(8,67): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/datepicker/typings/year-view.d.ts(8,67): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/dialog/typings/dialog-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/dialog/typings/dialog-config.d.ts(8,34): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/dialog/typings/dialog-container.d.ts(8,92): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/dialog/typings/dialog-container.d.ts(9,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/dialog/typings/dialog-content-directives.d.ts(8,62): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/dialog/typings/dialog-ref.d.ts(9,26): error TS2307: Cannot find module '@angular/common'.
../../../node_modules/@angular/material/dialog/typings/dialog-ref.d.ts(11,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/dialog/typings/dialog.d.ts(3,26): error TS2307: Cannot find module '@angular/common'.
../../../node_modules/@angular/material/dialog/typings/dialog.d.ts(4,55): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/dialog/typings/dialog.d.ts(5,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/dialog/typings/dialog.d.ts(6,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/expansion/typings/expansion-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/expansion/typings/expansion-panel-content.d.ts(8,29): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/expansion/typings/expansion-panel-header.d.ts(9,58): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/expansion/typings/expansion-panel.d.ts(8,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/expansion/typings/expansion-panel.d.ts(9,108): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/expansion/typings/expansion-panel.d.ts(13,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/form-field/typings/form-field-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/form-field/typings/form-field-control.d.ts(8,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/form-field/typings/form-field-control.d.ts(9,27): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/form-field/typings/form-field.d.ts(1,112): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/grid-list/typings/grid-list.d.ts(8,68): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/grid-list/typings/grid-tile.d.ts(8,57): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/icon/typings/icon-registry.d.ts(1,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/icon/typings/icon-registry.d.ts(2,28): error TS2307: Cannot find module '@angular/common/http'.
../../../node_modules/@angular/material/icon/typings/icon-registry.d.ts(3,47): error TS2307: Cannot find module '@angular/platform-browser'.
../../../node_modules/@angular/material/icon/typings/icon-registry.d.ts(4,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/icon/typings/icon.d.ts(1,62): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/input/typings/autosize.d.ts(8,71): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/input/typings/input-value-accessor.d.ts(8,32): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/input/typings/input.d.ts(2,59): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/input/typings/input.d.ts(3,55): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/input/typings/input.d.ts(6,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/list/typings/list.d.ts(8,57): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/list/typings/selection-list.d.ts(10,109): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/list/typings/selection-list.d.ts(12,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/menu/typings/menu-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/menu/typings/menu-content.d.ts(8,110): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/menu/typings/menu-directive.d.ts(8,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/menu/typings/menu-directive.d.ts(10,119): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/menu/typings/menu-directive.d.ts(11,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/menu/typings/menu-item.d.ts(9,39): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/menu/typings/menu-item.d.ts(11,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/menu/typings/menu-panel.d.ts(8,43): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/menu/typings/menu-trigger.d.ts(3,105): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/paginator/typings/paginator-intl.d.ts(8,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/paginator/typings/paginator-intl.d.ts(9,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/paginator/typings/paginator.d.ts(1,68): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/progress-bar/typings/progress-bar.d.ts(8,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/progress-spinner/typings/progress-spinner.d.ts(8,54): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/radio/typings/radio.d.ts(10,124): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/radio/typings/radio.d.ts(11,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/select/typings/select-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/select/typings/select.d.ts(12,168): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/select/typings/select.d.ts(13,77): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/select/typings/select.d.ts(16,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/sidenav/typings/drawer-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/sidenav/typings/drawer.d.ts(8,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/sidenav/typings/drawer.d.ts(12,146): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/sidenav/typings/drawer.d.ts(13,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/sidenav/typings/drawer.d.ts(14,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/sidenav/typings/sidenav.d.ts(8,46): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/slide-toggle/typings/slide-toggle.d.ts(10,90): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/slide-toggle/typings/slide-toggle.d.ts(11,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/slider/typings/slider.d.ts(10,80): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/slider/typings/slider.d.ts(11,38): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-config.d.ts(8,50): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-container.d.ts(8,97): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-container.d.ts(9,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-container.d.ts(11,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-container.d.ts(12,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar-ref.d.ts(9,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/snack-bar/typings/snack-bar.d.ts(12,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/sort/typings/sort-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/sort/typings/sort-header-intl.d.ts(8,26): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/sort/typings/sort-header-intl.d.ts(9,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/sort/typings/sort-header.d.ts(8,35): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/sort/typings/sort.d.ts(8,52): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/sort/typings/sort.d.ts(11,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/stepper/typings/step-header.d.ts(9,71): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/stepper/typings/step-label.d.ts(8,29): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/stepper/typings/stepper-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/stepper/typings/stepper-icon.d.ts(8,29): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/stepper/typings/stepper-intl.d.ts(1,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/stepper/typings/stepper.d.ts(10,89): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/stepper/typings/stepper.d.ts(11,57): error TS2307: Cannot find module '@angular/forms'.
../../../node_modules/@angular/material/table/typings/cell.d.ts(8,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/table/typings/table-data-source.d.ts(9,33): error TS2307: Cannot find module 'rxjs/BehaviorSubject'.
../../../node_modules/@angular/material/table/typings/table-data-source.d.ts(12,30): error TS2307: Cannot find module 'rxjs/Subscription'.
../../../node_modules/@angular/material/tabs/typings/ink-bar.d.ts(8,36): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-body.d.ts(8,105): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-body.d.ts(9,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/tabs/typings/tab-group.d.ts(8,122): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-header.d.ts(9,122): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-label-wrapper.d.ts(8,28): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-label.d.ts(8,47): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab-nav-bar/tab-nav-bar.d.ts(11,95): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab.d.ts(9,92): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tabs/typings/tab.d.ts(11,25): error TS2307: Cannot find module 'rxjs/Subject'.
../../../node_modules/@angular/material/tabs/typings/tabs-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/toolbar/typings/toolbar.d.ts(8,54): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tooltip/typings/tooltip-animations.d.ts(8,42): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/tooltip/typings/tooltip.d.ts(8,32): error TS2307: Cannot find module '@angular/animations'.
../../../node_modules/@angular/material/tooltip/typings/tooltip.d.ts(14,100): error TS2307: Cannot find module '@angular/core'.
../../../node_modules/@angular/material/tooltip/typings/tooltip.d.ts(15,28): error TS2307: Cannot find module 'rxjs/Observable'.
../../../node_modules/@angular/material/typings/version.d.ts(8,25): error TS2307: Cannot find module '@angular/core'.

I'm clueless at this point. Can someone please help me out?

package.json: https://pastebin.com/GzfVg1cs

Improve this question
6
  • 1
    can you update your npm dependencies and try npm update Commented Mar 19, 2018 at 9:11
  • Still getting the same error. and everything already was up to date Commented Mar 19, 2018 at 9:18
  • npm ls @angular/core See if there's any output Commented Mar 19, 2018 at 10:00
  • └── @angular/[email protected] is the output Commented Mar 19, 2018 at 10:04
  • Whats inside your package.json? Commented Mar 19, 2018 at 11:14

5 Answers 5

Reset to default
38

This problem apparently was being caused by the CDK and material modules of angular. I don't exactly know how it happend but I fixed it.

I fixed it by following an answer in this github issue: https://github.com/angular/material2/issues/8306

Solution

To fix this issue you have to run the following commands:

npm install --save @angular/material @angular/cdk
rm -rf node_modules
npm install
Improve this answer
Sign up to request clarification or add additional context in comments.

3 Comments

too radical solution
Important - close your IDE before deleting folder node_modules, and open it after finished to execute npm install
Why is it important to close your IDE before deleting node_modules?
7

I see that some solutions are radical, I would not to try that in the first place. My solution was not radical, and it did the job.

I had the problem too, I did a simple npm update This was what came out:

$> npm update
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ [email protected]
+ [email protected]
added 2 packages from 6 contributors and audited 38996 packages in 13.315s
found 0 vulnerabilities

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ @types/[email protected]
updated 1 package and audited 38996 packages in 12.972s
found 0 vulnerabilities

And it solved the problem.

Improve this answer

1 Comment

Thanks! This is still an actual solution!
4

In order to fix this issue you have to update to Angular CLI version, as @angular cdk 6.0 requires @angular core 6.0 version(updated version). Try to use updated version for both CLI and material/CDK

Follow these steps:-

npm uninstall -g @angular/cli
npm cache verify

if npm version is less than 5 then use npm cache clean

npm install -g @angular/cli@latest

then create new angluar/cli project after that install @angular/material and @angular/cdk.

I hope this will solve your problem.

Improve this answer

Comments

3

For me problem got resolved when I make sure that @angular/material, @angular/ckd and @angular/animations versions are compatible with @angular/core version. Just edit package.json.

In my case:

"@angular/core": "^7.2.15",
"@angular/animations": "^7.2.15",
"@angular/material": "^7.3.3",
"@angular/cdk": "^7.3.7",
Improve this answer

1 Comment

Thank you! Just needed to add: "@angular/cdk": "^7.3.7",
0
  1. open cmd as administrator
  2. check to see if @angular/cdk is being installed or not

npm ls @angular/core

  1. If it's not installed, run the below command

npm install @angular/cdk

  1. npm install

  2. npm install -g @angular/cli@latest

enter image description here

Improve this answer

Comments

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.