8 lines
5.0 KiB
Plaintext
8 lines
5.0 KiB
Plaintext
{
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"version": 3,
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"sources": ["../../.pnpm/svelte@3.55.0/node_modules/svelte/store/index.mjs"],
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"sourcesContent": ["import { noop, safe_not_equal, subscribe, run_all, is_function } from '../internal/index.mjs';\nexport { get_store_value as get } from '../internal/index.mjs';\n\nconst subscriber_queue = [];\n/**\n * Creates a `Readable` store that allows reading by subscription.\n * @param value initial value\n * @param {StartStopNotifier}start start and stop notifications for subscriptions\n */\nfunction readable(value, start) {\n return {\n subscribe: writable(value, start).subscribe\n };\n}\n/**\n * Create a `Writable` store that allows both updating and reading by subscription.\n * @param {*=}value initial value\n * @param {StartStopNotifier=}start start and stop notifications for subscriptions\n */\nfunction writable(value, start = noop) {\n let stop;\n const subscribers = new Set();\n function set(new_value) {\n if (safe_not_equal(value, new_value)) {\n value = new_value;\n if (stop) { // store is ready\n const run_queue = !subscriber_queue.length;\n for (const subscriber of subscribers) {\n subscriber[1]();\n subscriber_queue.push(subscriber, value);\n }\n if (run_queue) {\n for (let i = 0; i < subscriber_queue.length; i += 2) {\n subscriber_queue[i][0](subscriber_queue[i + 1]);\n }\n subscriber_queue.length = 0;\n }\n }\n }\n }\n function update(fn) {\n set(fn(value));\n }\n function subscribe(run, invalidate = noop) {\n const subscriber = [run, invalidate];\n subscribers.add(subscriber);\n if (subscribers.size === 1) {\n stop = start(set) || noop;\n }\n run(value);\n return () => {\n subscribers.delete(subscriber);\n if (subscribers.size === 0) {\n stop();\n stop = null;\n }\n };\n }\n return { set, update, subscribe };\n}\nfunction derived(stores, fn, initial_value) {\n const single = !Array.isArray(stores);\n const stores_array = single\n ? [stores]\n : stores;\n const auto = fn.length < 2;\n return readable(initial_value, (set) => {\n let inited = false;\n const values = [];\n let pending = 0;\n let cleanup = noop;\n const sync = () => {\n if (pending) {\n return;\n }\n cleanup();\n const result = fn(single ? values[0] : values, set);\n if (auto) {\n set(result);\n }\n else {\n cleanup = is_function(result) ? result : noop;\n }\n };\n const unsubscribers = stores_array.map((store, i) => subscribe(store, (value) => {\n values[i] = value;\n pending &= ~(1 << i);\n if (inited) {\n sync();\n }\n }, () => {\n pending |= (1 << i);\n }));\n inited = true;\n sync();\n return function stop() {\n run_all(unsubscribers);\n cleanup();\n };\n });\n}\n\nexport { derived, readable, writable };\n"],
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"names": ["subscribe"]
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}
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