When you need Promise.all() but you want it to resolve even if an item rejects.

README.md

Promise.notAll

Used when you need Promise.all() but you want it to resolve to an array even if an item rejects.

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Assume we have Promises a, b, and c. Also assume that b rejects with an Error.

With await Promise.all([a, b, c]), will throw an Error.

With await Promise.notAll([a, b, c]), the result would be an array like: [resultOfA, null, resultOfB], instead of throwing an Error.

Promise.notAll.js

Promise.notAll = (list, options) => {
  const resultPromises = list.map(value => {
    return new Promise(async (resolve, reject) => {
      try {
        const result = await value
        if ('resolve' in options) options.resolve(result)
        resolve(result)
      } catch(err) {
        if ('reject' in options) options.reject(err)
        resolve(null)
      }
    })
  })

  return Promise.all(resultPromises)
}