54 lines
1.9 KiB
JavaScript
54 lines
1.9 KiB
JavaScript
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(function(l, r) { if (!l || l.getElementById('livereloadscript')) return; r = l.createElement('script'); r.async = 1; r.src = '//' + (self.location.host || 'localhost').split(':')[0] + ':35729/livereload.js?snipver=1'; r.id = 'livereloadscript'; l.getElementsByTagName('head')[0].appendChild(r) })(self.document);
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import { n as noop, s as safe_not_equal } from './index-122ecbb4.js';
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const subscriber_queue = [];
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/**
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* Create a `Writable` store that allows both updating and reading by subscription.
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* @param {*=}value initial value
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* @param {StartStopNotifier=}start start and stop notifications for subscriptions
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*/
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function writable(value, start = noop) {
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let stop;
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const subscribers = new Set();
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function set(new_value) {
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if (safe_not_equal(value, new_value)) {
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value = new_value;
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if (stop) { // store is ready
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const run_queue = !subscriber_queue.length;
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for (const subscriber of subscribers) {
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subscriber[1]();
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subscriber_queue.push(subscriber, value);
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}
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if (run_queue) {
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for (let i = 0; i < subscriber_queue.length; i += 2) {
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subscriber_queue[i][0](subscriber_queue[i + 1]);
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}
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subscriber_queue.length = 0;
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}
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}
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}
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}
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function update(fn) {
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set(fn(value));
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}
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function subscribe(run, invalidate = noop) {
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const subscriber = [run, invalidate];
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subscribers.add(subscriber);
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if (subscribers.size === 1) {
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stop = start(set) || noop;
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}
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run(value);
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return () => {
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subscribers.delete(subscriber);
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if (subscribers.size === 0) {
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stop();
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stop = null;
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}
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};
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}
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return { set, update, subscribe };
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}
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export { writable as w };
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