26 lines
1.1 KiB
TypeScript
26 lines
1.1 KiB
TypeScript
import { makeLazy } from "./misc";
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/**
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* Wraps the result of {@see makeLazy} in a Proxy you can consume as if it wasn't lazy.
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* On first property access, the lazy is evaluated
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* @param factory lazy factory
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* @returns Proxy
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*
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* Note that the example below exists already as an api, see {@link lazyWebpack}
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* @example const mod = proxyLazy(() => findByProps("blah")); console.log(mod.blah);
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*/
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export function proxyLazy<T>(factory: () => T): T {
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const lazy = makeLazy(factory);
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return new Proxy(() => null, {
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get: (_, prop) => lazy()[prop],
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set: (_, prop, value) => lazy()[prop] = value,
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has: (_, prop) => prop in lazy(),
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apply: (_, $this, args) => (lazy() as Function).apply($this, args),
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ownKeys: () => Reflect.ownKeys(lazy() as object),
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construct: (_, args, newTarget) => Reflect.construct(lazy() as Function, args, newTarget),
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deleteProperty: (_, prop) => delete lazy()[prop],
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defineProperty: (_, property, attributes) => !!Object.defineProperty(lazy(), property, attributes)
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}) as any as T;
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}
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