reflect-metadata-ng

Full-featured "reflect-metadata" remastered for modern environments with preserved relevant comments, tsdocs and tests.

Compare for yourself:

https://github.com/rbuckton/reflect-metadata/blob/master/Reflect.ts
https://github.com/thephoenixofthevoid/reflect-metadata-ng/blob/master/Reflect.ts

Features

• Full-featured "reflect-metadata" remastered for modern environments.
• Tests and original implementation taken from https://github.com/rbuckton/reflect-metadata
• Tests have been carefully preserved (and merged into single file).
• No test broke on modern envirimnent after remastering.
• Similar to https://github.com/abraham/reflection but implements FULL API

Usage

// Before: once at the very start of an application
import "reflect-metadata";

// Simply replace it with
import "./Reflect.ts";

// Well-dine!

Spec-complient

 PASS  ./Reflect.spec.ts
  Reflect.decorate
    ✓ ThrowsIfDecoratorsArgumentNotArrayForFunctionOverload (83 ms)
    ✓ ThrowsIfTargetArgumentNotFunctionForFunctionOverload (1 ms)
    ✓ ThrowsIfDecoratorsArgumentNotArrayForPropertyOverload (1 ms)
    ✓ ThrowsIfTargetArgumentNotObjectForPropertyOverload (1 ms)
    ✓ ThrowsIfDecoratorsArgumentNotArrayForPropertyDescriptorOverload (2 ms)
    ✓ ThrowsIfTargetArgumentNotObjectForPropertyDescriptorOverload (1 ms)
    ✓ ExecutesDecoratorsInReverseOrderForFunctionOverload (1 ms)
    ✓ ExecutesDecoratorsInReverseOrderForPropertyOverload (1 ms)
    ✓ ExecutesDecoratorsInReverseOrderForPropertyDescriptorOverload (1 ms)
    ✓ DecoratorPipelineForFunctionOverload (1 ms)
    ✓ DecoratorPipelineForPropertyOverload
    ✓ DecoratorPipelineForPropertyDescriptorOverload (1 ms)
    ✓ DecoratorCorrectTargetInPipelineForFunctionOverload
    ✓ DecoratorCorrectTargetInPipelineForPropertyOverload (1 ms)
    ✓ DecoratorCorrectNameInPipelineForPropertyOverload
    ✓ DecoratorCorrectTargetInPipelineForPropertyDescriptorOverload
    ✓ DecoratorCorrectNameInPipelineForPropertyDescriptorOverload (1 ms)
    ✓ DecoratorCorrectDescriptorInPipelineForPropertyDescriptorOverload
  Reflect.defineMetadata
    ✓ InvalidTarget
    ✓ ValidTargetWithoutTargetKey (1 ms)
    ✓ ValidTargetWithTargetKey (1 ms)
  Reflect.deleteMetadata
    ✓ InvalidTarget (1 ms)
    ✓ WhenNotDefinedWithoutTargetKey (1 ms)
    ✓ WhenDefinedWithoutTargetKey (1 ms)
    ✓ WhenDefinedOnPrototypeWithoutTargetKey (1 ms)
    ✓ AfterDeleteMetadata (1 ms)
    ✓ KeysKeysInvalidTarget (1 ms)
    ✓ KeysWithoutTargetKeyWhenNotDefined (1 ms)
    ✓ KeysWithoutTargetKeyWhenDefined
    ✓ KeysWithoutTargetKeyWhenDefinedOnPrototype (1 ms)
    ✓ KeysOrderWithoutTargetKey (1 ms)
    ✓ KeysOrderAfterRedefineWithoutTargetKey (1 ms)
    ✓ KeysWithTargetKeyWhenNotDefined (1 ms)
    ✓ KeysWithTargetKeyWhenDefined (1 ms)
    ✓ KeysWithTargetKeyWhenDefinedOnPrototype (1 ms)
    ✓ KeysOrderAfterRedefineWithTargetKey (1 ms)
  Reflect.getMetadataKeys
    ✓ KeysInvalidTarget (1 ms)
    ✓ KeysWithoutTargetKeyWhenNotDefined (1 ms)
    ✓ KeysWithoutTargetKeyWhenDefined
    ✓ KeysWithoutTargetKeyWhenDefinedOnPrototype
    ✓ KeysOrderWithoutTargetKey
    ✓ KeysOrderAfterRedefineWithoutTargetKey (1 ms)
    ✓ KeysOrderWithoutTargetKeyWhenDefinedOnPrototype
    ✓ KeysWithTargetKeyWhenNotDefined (1 ms)
    ✓ KeysWithTargetKeyWhenDefined
    ✓ KeysWithTargetKeyWhenDefinedOnPrototype
    ✓ KeysOrderAfterRedefineWithTargetKey (1 ms)
    ✓ KeysOrderWithTargetKeyWhenDefinedOnPrototype
  Reflect.getMetadata
    ✓ InvalidTarget (1 ms)
    ✓ WithoutTargetKeyWhenNotDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefined
    ✓ WithoutTargetKeyWhenDefinedOnPrototype
    ✓ WithTargetKeyWhenNotDefined (5 ms)
    ✓ WithTargetKeyWhenDefined (1 ms)
    ✓ WithTargetKeyWhenDefinedOnPrototype
  Reflect.getOwnMetadata
    ✓ InvalidTarget (2 ms)
    ✓ WithoutTargetKeyWhenNotDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefinedOnPrototype (1 ms)
    ✓ WithTargetKeyWhenNotDefined (1 ms)
    ✓ WithTargetKeyWhenDefined (1 ms)
    ✓ WithTargetKeyWhenDefinedOnPrototype
  Reflect.hasMetadata
    ✓ InvalidTarget (2 ms)
    ✓ WithoutTargetKeyWhenNotDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefinedOnPrototype (1 ms)
    ✓ WithTargetKeyWhenNotDefined (1 ms)
    ✓ WithTargetKeyWhenDefined (1 ms)
    ✓ WithTargetKeyWhenDefinedOnPrototype (1 ms)
  Reflect.hasOwnMetadata
    ✓ InvalidTarget (1 ms)
    ✓ WithoutTargetKeyWhenNotDefined
    ✓ WithoutTargetKeyWhenDefined (1 ms)
    ✓ WithoutTargetKeyWhenDefinedOnPrototype (1 ms)
    ✓ WithTargetKeyWhenNotDefined (1 ms)
    ✓ WithTargetKeyWhenDefined
    ✓ WithTargetKeyWhenDefinedOnPrototype (1 ms)
  Reflect.metadata
    ✓ ReturnsDecoratorFunction (1 ms)
    ✓ DecoratorThrowsWithInvalidTargetWithTargetKey (8 ms)
    ✓ DecoratorThrowsWithInvalidTargetKey (1 ms)
    ✓ OnTargetWithoutTargetKey
    ✓ OnTargetWithTargetKey

Test Suites: 1 passed, 1 total
Tests:       81 passed, 81 total
Snapshots:   0 total
Time:        2.83 s
Ran all test suites.
Done in 4.16s.

Comparation with alternatives

API \ package	reflection	RM	RM-NG
decorate	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
defineMetadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
getMetadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
hasMetadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
getOwnMetadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
hasOwnMetadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
metadata	IMPLEMENTED	IMPLEMENTED	IMPLEMENTED
deleteMetadata	MISSING	IMPLEMENTED	IMPLEMENTED
getMetadataKeys	MISSING	IMPLEMENTED	IMPLEMENTED
getOwnMetadataKeys	MISSING	IMPLEMENTED	IMPLEMENTED
js filesize, KB	3K	50K	11K
Old Runtimes	NO	YES	NO
NEW Runtimes	YES	YES	YES

Usage

Just import the same way you would original package