TypeTags .TypeError
Overview
The TypeError object represents an error when an operation could not be performed, typically (but not exclusively) when a value is not of the expected type.
️🚫
Since error objects do not have unique type tags, a TypeError type tag
is the same as any other Error object. If you need to check if an error is
an instance of a TypeError, use instanceof instead.
Usage
import { TypeTags } from 'typetags'
try { throw new TypeError('Hello', 'someFile.js', 10)} catch (e) { console.log(e instanceof TypeError) // true TypeTags.get(e) === TypeTags.RangeError // → true}
console.log(TypeTags.TypeError)// → [object Error]Metadata (TType)
| Metadata | Value |
|---|---|
.type | TypeError |
.tag | [object Error] |
.builtin() | undefined |
.getTag() | [object Error] |
.hasSpecialArgs() | false |
.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}