TypeTags .AggregateError

Overview

The AggregateError object represents an error when several errors need to be wrapped in a single error. It is thrown when multiple errors need to be reported by an operation, for example by Promise.any(), when all promises passed to it reject.

Usage

import { TypeTags } from 'typetags'


Promise.any([Promise.reject(new Error('some error'))]).catch((e) => {
  console.log(e instanceof AggregateError) // true
})


console.log(TypeTags.AggregateError)
// → [object Error]


TypeTags.get(new AggregateError([]))
// → [object Error]

Predicate

.isAggregateError(value)

️🚫

Since error objects do not have unique type tags, an AggregateError type tag is the same as any other Error object. If you need to check if an error is an instance of an AggregateError, use instanceof instead.

  • Checks if value is or has a default AggregateError type tag.
const { TypeTags } = require('typetags')


let error = new AggregateError([])


TypeTags.isAggregateError(error)
// → true


TypeTags.get(error)
// → [object AggregateError]

Metadata (TType)

MetadataValue
.typeAggregateError
.tag[object Error]
.builtin()undefined
.getTag()[object Error]
.hasSpecialArgs()true
.instance()undefined
.instanceTypeOf()object
.info()see more
.isAvailable()true
.isConstructor()true
.isFactory()true
.isFunction()true
.isGlobal()true
.isIterator()false
.isNested()false
.isObject()false
.isPrimitive()false
.isStringifiable()true
.isSyntatic()false
.isTypedArray()false
.ownKeys()[length, name, prototype]
.toString()function toString() { [native code] }
.typeOf()function

Signature

declare type ITypeTags = {
  [key in Types | NestedTypes]: Tags
}


declare interface Predicate {
  predicate(value: any): boolean
}

See MDN Web Docs