@tanstack/lit-virtual/dist/cjs/index.cjs.map

Headless UI for virtualizing scrollable elements in Lit

{"version":3,"file":"index.cjs","sources":["../../src/index.ts"],"sourcesContent":["import {\n  Virtualizer,\n  elementScroll,\n  observeElementOffset,\n  observeElementRect,\n  observeWindowOffset,\n  observeWindowRect,\n  windowScroll,\n} from '@tanstack/virtual-core'\nimport type { ReactiveController, ReactiveControllerHost } from 'lit'\nimport type { PartialKeys, VirtualizerOptions } from '@tanstack/virtual-core'\n\nclass VirtualizerControllerBase<\n  TScrollElement extends Element | Window,\n  TItemElement extends Element,\n> implements ReactiveController\n{\n  host: ReactiveControllerHost\n\n  private readonly virtualizer: Virtualizer<TScrollElement, TItemElement>\n\n  private cleanup: () => void = () => {}\n\n  constructor(\n    host: ReactiveControllerHost,\n    options: VirtualizerOptions<TScrollElement, TItemElement>,\n  ) {\n    ;(this.host = host).addController(this)\n\n    const resolvedOptions: VirtualizerOptions<TScrollElement, TItemElement> = {\n      ...options,\n      onChange: (instance, sync) => {\n        this.host.updateComplete.then(() => this.host.requestUpdate())\n        options.onChange?.(instance, sync)\n      },\n    }\n    this.virtualizer = new Virtualizer(resolvedOptions)\n  }\n\n  public getVirtualizer() {\n    return this.virtualizer\n  }\n\n  async hostConnected() {\n    this.cleanup = this.virtualizer._didMount()\n  }\n\n  hostUpdated() {\n    this.virtualizer._willUpdate()\n  }\n\n  hostDisconnected() {\n    this.cleanup()\n  }\n}\n\nexport class VirtualizerController<\n  TScrollElement extends Element,\n  TItemElement extends Element,\n> extends VirtualizerControllerBase<TScrollElement, TItemElement> {\n  constructor(\n    host: ReactiveControllerHost,\n    options: PartialKeys<\n      VirtualizerOptions<TScrollElement, TItemElement>,\n      'observeElementRect' | 'observeElementOffset' | 'scrollToFn'\n    >,\n  ) {\n    super(host, {\n      observeElementRect: observeElementRect,\n      observeElementOffset: observeElementOffset,\n      scrollToFn: elementScroll,\n      ...options,\n    })\n  }\n}\n\nexport class WindowVirtualizerController<\n  TItemElement extends Element,\n> extends VirtualizerControllerBase<Window, TItemElement> {\n  constructor(\n    host: ReactiveControllerHost,\n    options: PartialKeys<\n      VirtualizerOptions<Window, TItemElement>,\n      | 'getScrollElement'\n      | 'observeElementRect'\n      | 'observeElementOffset'\n      | 'scrollToFn'\n    >,\n  ) {\n    super(host, {\n      getScrollElement: () => (typeof document !== 'undefined' ? window : null),\n      observeElementRect: observeWindowRect,\n      observeElementOffset: observeWindowOffset,\n      scrollToFn: windowScroll,\n      initialOffset: () =>\n        typeof document !== 'undefined' ? window.scrollY : 0,\n      ...options,\n    })\n  }\n}\n"],"names":["Virtualizer","observeElementRect","observeElementOffset","elementScroll","observeWindowRect","observeWindowOffset","windowScroll"],"mappings":";;;AAYA,MAAM,0BAIN;AAAA,EAOE,YACE,MACA,SACA;AALF,SAAQ,UAAsB,MAAM;AAAA,IAAC;AAMlC,KAAC,KAAK,OAAO,MAAM,cAAc,IAAI;AAEtC,UAAM,kBAAoE;AAAA,MACxE,GAAG;AAAA,MACH,UAAU,CAAC,UAAU,SAAS;;AAC5B,aAAK,KAAK,eAAe,KAAK,MAAM,KAAK,KAAK,eAAe;AACrD,sBAAA,aAAA,iCAAW,UAAU;AAAA,MAAI;AAAA,IAErC;AACK,SAAA,cAAc,IAAIA,YAAA,YAAY,eAAe;AAAA,EAAA;AAAA,EAG7C,iBAAiB;AACtB,WAAO,KAAK;AAAA,EAAA;AAAA,EAGd,MAAM,gBAAgB;AACf,SAAA,UAAU,KAAK,YAAY,UAAU;AAAA,EAAA;AAAA,EAG5C,cAAc;AACZ,SAAK,YAAY,YAAY;AAAA,EAAA;AAAA,EAG/B,mBAAmB;AACjB,SAAK,QAAQ;AAAA,EAAA;AAEjB;AAEO,MAAM,8BAGH,0BAAwD;AAAA,EAChE,YACE,MACA,SAIA;AACA,UAAM,MAAM;AAAA,MAAA,oBACVC,YAAA;AAAA,MAAA,sBACAC,YAAA;AAAA,MACA,YAAYC,YAAA;AAAA,MACZ,GAAG;AAAA,IAAA,CACJ;AAAA,EAAA;AAEL;AAEO,MAAM,oCAEH,0BAAgD;AAAA,EACxD,YACE,MACA,SAOA;AACA,UAAM,MAAM;AAAA,MACV,kBAAkB,MAAO,OAAO,aAAa,cAAc,SAAS;AAAA,MACpE,oBAAoBC,YAAA;AAAA,MACpB,sBAAsBC,YAAA;AAAA,MACtB,YAAYC,YAAA;AAAA,MACZ,eAAe,MACb,OAAO,aAAa,cAAc,OAAO,UAAU;AAAA,MACrD,GAAG;AAAA,IAAA,CACJ;AAAA,EAAA;AAEL;;;"}