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"shasum": "3d8b2aceea3e49f8e5883947838e9370f15c9e28" } }, "_rev": "2-91c93fd0d1e985a0", "_id": "p-lazy", "readme": "# p-lazy [![Build Status](https://travis-ci.org/sindresorhus/p-lazy.svg?branch=master)](https://travis-ci.org/sindresorhus/p-lazy)\n\n> Create a lazy promise that defers execution until it's awaited or when `.then()` or `.catch()` is called\n\nUseful if you're doing some heavy operations and would like to only do it when the promise is actually used.\n\n\n## Install\n\n```\n$ npm install p-lazy\n```\n\n\n## Usage\n\n```js\nconst PLazy = require('p-lazy');\n\nconst lazyPromise = new PLazy(resolve => {\n\tsomeHeavyOperation(resolve);\n});\n\n// `someHeavyOperation` is not yet called\n\n(async () => {\n\tawait doSomethingFun;\n\t// `someHeavyOperation` is called\n\tconsole.log(await lazyPromise);\n})();\n```\n\n\n## API\n\n### new PLazy(executor)\n\nSame as the [`Promise` constructor](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise). `PLazy` is a subclass of `Promise`.\n\n### PLazy.from(fn)\n\nCreate a `PLazy` promise from a promise-returning or async function.\n\n\n## Related\n\n- [p-cancelable](https://github.com/sindresorhus/p-cancelable) - Create a promise that can be canceled\n- [p-defer](https://github.com/sindresorhus/p-defer) - Create a deferred promise\n- [lazy-value](https://github.com/sindresorhus/lazy-value) - Create a lazily evaluated value\n- [define-lazy-prop](https://github.com/sindresorhus/define-lazy-prop) - Define a lazily evaluated property on an object\n- [More…](https://github.com/sindresorhus/promise-fun)\n\n\n## License\n\nMIT © [Sindre Sorhus](https://sindresorhus.com)" }