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feat(framework): VirtualList — the im thread pattern as a component #165

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feat(framework): VirtualList — the im thread pattern as a component #165

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529f2c2
feat(framework): VirtualList — the im thread pattern as a component
doodlewind Jul 23, 2026
fb3a519
feat(virtual-list): focusRow — programmatic row focus
doodlewind Jul 23, 2026
058fb34
fix(virtual-list): untrack props reads inside handle methods
doodlewind Jul 23, 2026
c6164e7
fix(virtual-list): default the viewport to full parent width
doodlewind Jul 23, 2026
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2 changes: 2 additions & 0 deletions framework/compiler/jsx-plugin.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ const LIFECYCLE_VUE_VAPOR_PATH = new URL("../src/lifecycle-vue-vapor.ts", import
const OSK_PATH = new URL("../src/osk.tsx", import.meta.url).pathname;
const PLATFORM_PATH = new URL("../src/platform.ts", import.meta.url).pathname;
const PRELUDE_PATH = new URL("../src/prelude.ts", import.meta.url).pathname;
const VIRTUAL_LIST_PATH = new URL("../src/virtual-list.ts", import.meta.url).pathname;
const VUE_VAPOR_RUNTIME_PATH = new URL(
"../../node_modules/vue/dist/vue.runtime-with-vapor.esm-browser.prod.js",
import.meta.url,
Expand Down Expand Up @@ -91,6 +92,7 @@ export const FRAMEWORKS: Record<
platform: PLATFORM_PATH,
prelude: PRELUDE_PATH,
renderer: RENDERER_SOLID_PATH,
"virtual-list": VIRTUAL_LIST_PATH,
},
},
"vue-vapor": {
Expand Down
10 changes: 8 additions & 2 deletions framework/src/kinetics.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,9 @@ export interface Scroller {
/** Shift offset AND every in-flight anchor by delta after a prepend, so
* backfill never moves what the user is looking at (the im rebase). */
rebase(delta: number): void;
/** The position the scroller is heading to: the chase/tween target when
* one is in flight, the current offset otherwise. */
intent(): number;
/** At the end of the range, judged on INTENT: the chase/tween target when
* one is in flight, the position otherwise (the im at-bottom rule). */
isAtEnd(slackPx?: number): boolean;
Expand Down Expand Up @@ -264,9 +267,12 @@ export function createScroller(opts: ScrollerOptions): Scroller {
emit(pos + delta);
},

intent(): number {
return state === "chase" ? target : state === "tween" ? tweenTo : pos;
},

isAtEnd(slackPx = 1): boolean {
const intent = state === "chase" ? target : state === "tween" ? tweenTo : pos;
return intent >= opts.max() - slackPx;
return this.intent() >= opts.max() - slackPx;
},

projectFling,
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