one
Version:
One is a new React Framework that makes Vite serve both native and web.
56 lines (55 loc) • 1.8 kB
JavaScript
function createPrefetchViewport() {
var done = /* @__PURE__ */new Set(),
nodes = /* @__PURE__ */new Map(),
io = null,
onPrefetch = null;
function getObserver() {
return io || (io = new IntersectionObserver(function (entries) {
var _iteratorNormalCompletion = !0,
_didIteratorError = !1,
_iteratorError = void 0;
try {
for (var _iterator = entries[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0) {
var entry = _step.value;
if (entry.isIntersecting) {
var href = nodes.get(entry.target);
href && !done.has(href) && (done.add(href), onPrefetch?.(href));
}
}
} catch (err) {
_didIteratorError = !0, _iteratorError = err;
} finally {
try {
!_iteratorNormalCompletion && _iterator.return != null && _iterator.return();
} finally {
if (_didIteratorError) throw _iteratorError;
}
}
}, {
threshold: 0.5
}), io);
}
function start(prefetch) {
onPrefetch = prefetch;
}
function observe(el, href) {
return nodes.set(el, href), getObserver().observe(el), function () {
nodes.delete(el), io?.unobserve(el), done.delete(href);
};
}
return {
start,
observe,
done,
nodes
};
}
var instance = null;
function startPrefetchViewport(prefetch) {
instance || (instance = createPrefetchViewport()), instance.start(prefetch);
}
function observePrefetchViewport(el, href) {
return instance || (instance = createPrefetchViewport()), instance.observe(el, href);
}
export { createPrefetchViewport, observePrefetchViewport, startPrefetchViewport };
//# sourceMappingURL=prefetchViewport.native.js.map