@tanstack/virtual-core
Version:
Headless UI for virtualizing scrollable elements in TS/JS + Frameworks
35 lines (34 loc) • 1.06 kB
JavaScript
;
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
function createLazyMeasurementsView(count, flat, getItemKey) {
const cache = new Array(count);
return new Proxy(cache, {
get(target, prop, receiver) {
if (typeof prop === "string") {
const c = prop.charCodeAt(0);
if (c >= 48 && c <= 57) {
const i = +prop;
if (Number.isInteger(i) && i >= 0 && i < count) {
let v = target[i];
if (!v) {
const s = flat[i * 2];
v = target[i] = {
index: i,
key: getItemKey(i),
start: s,
size: flat[i * 2 + 1],
end: s + flat[i * 2 + 1],
lane: 0
};
}
return v;
}
}
if (prop === "length") return count;
}
return Reflect.get(target, prop, receiver);
}
});
}
exports.createLazyMeasurementsView = createLazyMeasurementsView;
//# sourceMappingURL=lazy-measurements.cjs.map