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reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["async","promise","retry"],"created_at":"2024-10-04T10:23:54.444Z","updated_at":"2026-02-07T07:32:10.139Z","avatar_url":"https://github.com/kouhin.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"retryit\n========\n\nA Promise version of [async/retry](https://github.com/caolan/async). Also includes serveral WaitStrategies that might be useful for situations where more well-behaved service polling is preferred.\n\n**Thanks to [Caolan McMahon](https://github.com/caolan) for the great work!**\n\n[![CircleCI](https://img.shields.io/circleci/project/github/kouhin/retryit.svg)](https://circleci.com/gh/kouhin/retryit/tree/master)\n[![Coverage Status](https://coveralls.io/repos/github/kouhin/retryit/badge.svg?branch=master)](https://coveralls.io/github/kouhin/retryit?branch=master)\n[![npm](https://img.shields.io/npm/v/retryit.svg)](https://www.npmjs.com/package/retryit)\n[![dependency status](https://david-dm.org/kouhin/retryit.svg?style=flat-square)](https://david-dm.org/kouhin/retryit)\n\n## Installation\n\n```sh\nnpm install retryit --save\n```\n\n# API \u0026\u0026 Usage\n\n## retryit(opts, task)\n\n#### Arguments\n\n- `opts`: Object |  number \u003coptional\u003e\n  - **Default**: `{ times: 5, interval: 0, errorFilter: () =\u003e true }`\n  - *Description*:\n    - `opts` can be either an object or a number.\n    - `times` - The number of attempts to make before giving up. The default is `5`.\n    - `interval` - The time to wait between retries, in milliseconds. The default is 0. The interval may also be specified as a function of the retry count (see example). This library provides serveral wait strategies that you can use it as interval.\n    - `errorFilter` - An optional synchronous function that is invoked on erroneous result. If it returns `true` the retry attempts will continue; if the function returns `false` the retry flow is aborted with the current attempt's error and result being returned to the final callback. Invoked with (err).\n    - If `opts` is a number, the number specifies the number of times to retry, with the default interval of `0`.\n- `task`: function(err)\n  - *Description*:\n    - A function which returns a Promise. The argument is previous error.\n\n#### Returns\n\n  - (Promise): A Promise object which will be resolved when the task has succeeded, or rejected with an error after the final failed attempt.\n\n#### Example\n\n``` javascript\nimport retryit from 'retyryit';\n\n// The `retry` function can be used as a stand-alone control flow by passing\n// a callback, as shown below:\n\n// try calling getPromise 3 times\nretryit(3, (err) =\u003e {\n    if (err) {\n      // err is previous error\n      console.error(err);\n    }\n    // return a Promise\n  })\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n\n// try calling getPromise 3 times, waiting 200 ms between each retry\nretryit({ times: 3, interval: 200 }, getPromise)\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n\nretryit({\n  times: 10,\n  interval: (retryCount) =\u003e {\n    return 50 * Math.pow(2, retryCount);\n  }\n}, getPromise)\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n\n// try calling getPromise the default 5 times no delay between each retry\nretryit(getPromise)\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n\n// try calling getPromise only when error condition satisfies, all other\n// errors will abort the retry control flow and return to final callback\nretryit({\n  errorFilter: function(err) {\n    return err.message === 'Temporary error'; // only retry on a specific error\n  }\n}, getPromise)\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n```\n\n## Build-in waitStrategies for opts.interval\n\n**Inspired by [guava-retrying](https://github.com/rholder/guava-retrying)**\n\n### `fixedWait(interval = 0)`\n\n- Returns a wait strategy that sleeps a fixed amount of time before retrying (in millisecond).\n\n### `exponentialWait(multiplier = 1, max = Number.MAX_VALUE)`\n\n- Returns a strategy which sleeps for an exponential amount of time after the first failed attempt, and in exponentially incrementing amounts after each failed attempt up to the maximumTime.\n\n### `fibonacciWait(multiplier = 1, max = Number.MAX_VALUE)`\n\n- Returns a strategy which sleeps for an increasing amount of time after the first failed attempt and in Fibonacci increments after each failed attempt up to the maximumTime.\n\n### `incrementingWait(initialSleepTime = 0, increment = 1000, max = Number.MAX_VALUE)`\n\n- Returns a strategy that sleeps a fixed amount of time after the first failed attempt and in incrementing amounts of time after each additional failed attempt.\n\n### `randomWait(min = 0, max = 0)`\n\n- Returns a strategy that sleeps a random amount of time before retrying.\n\n#### Example\n\n``` javascript\nimport retryit, { exponentialWait } from 'retryit';\n\nretryit({\n  times: 10,\n  interval: exponentialWait(2, 64),\n}, getPromise)\n  .then(result =\u003e {\n    // do something with the result\n  })\n  .catch(err =\u003e {\n    // do something with the error\n  });\n```\n\n## LICENSE\n\nMIT\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkouhin%2Fretryit","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkouhin%2Fretryit","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkouhin%2Fretryit/lists"}