microsoft/reflect-metadata

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Prototype for a Metadata Reflection API for ECMAScript

Stars: 3.4k
Forks: 190
Open beginner issues: 0
Indexed issues: 25
Avg merge: 13h 52m
Merged PRs (30d): 1

Dominant language: TypeScript
License: Apache-2.0
Last GitHub push: Aug 24, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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25 open issues indexed

In the Reflect.ts file, IsObject(target) and IsUndefined(propertyKey) are executed twice Open

Difficulty 1/5 Under an hour Newbie friendliness 58/100

microsoft/reflect-metadata#171 · 2 comments · Opened Dec 23, 2025
Security Improvements Suggestions Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/reflect-metadata#168 · Opened Apr 24, 2025
reflect-metadata@0.2.0 has a registry signaturere public key has expired Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

microsoft/reflect-metadata#166 · Opened Mar 10, 2025
Compatibility Issue in `reflect-metadata@0.2.1` When Methods Are Missing from Reflect Object Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/reflect-metadata#165 · 4 reactions · Opened Oct 20, 2024
Version conflicts occur in micro front-end projects Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/reflect-metadata#163 · 1 comment · Opened Apr 22, 2024
Wrong cached provider returned Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

microsoft/reflect-metadata#162 · Opened Apr 13, 2024
TypeError: Cannot read property 'Reflect' of undefined Open

Needs More Info Revisit

Difficulty 3/5 1-2 days Newbie friendliness 25/100

microsoft/reflect-metadata#125 · 1 comment · Opened Oct 4, 2020
My application stopped working if I use 1.13, it was working fine in 1.10 Open

Needs More Info

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/reflect-metadata#121 · 1 comment · Opened Apr 21, 2020
Reflect-metadata does not work properly Open

Needs More Info

Difficulty 3/5 1-2 days Newbie friendliness 32/100

microsoft/reflect-metadata#114 · 1 comment · Opened Sep 1, 2019
Exception when used in Firefox webextension content script Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/reflect-metadata#94 · 2 comments · 1 reaction · Opened Jul 11, 2018
What is Metadata? Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

microsoft/reflect-metadata#86 · 3 comments · Opened Jan 11, 2018
Cross-browser error Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

microsoft/reflect-metadata#85 · 1 comment · Opened Dec 23, 2017
Reflect-Metadata doesn't work with WebPack 3 Scope Hoisting Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/reflect-metadata#77 · 1 comment · 8 reactions · Opened Aug 2, 2017
shim is required Error Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

microsoft/reflect-metadata#74 · 1 comment · Opened Jul 13, 2017
Types Not Reflecting Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

microsoft/reflect-metadata#71 · 3 reactions · Opened Jun 8, 2017
Is there a way to get all metadata defined for a key, but not a specific target? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/reflect-metadata#70 · 1 comment · 1 reaction · Opened Jun 3, 2017
getMetadataKeys throw TypeError on IE Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/reflect-metadata#69 · 3 comments · Opened May 3, 2017
Empty value on production build Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/reflect-metadata#67 · Opened Apr 7, 2017
Module augmentation cannot introduce new names in the top level scope Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/reflect-metadata#66 · 1 comment · 2 reactions · Opened Mar 31, 2017
Ability to collect defined metadata property names Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/reflect-metadata#65 · 2 comments · 1 reaction · Opened Mar 28, 2017
Decorated class inheritance issue Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/reflect-metadata#62 · 11 comments · 9 reactions · Opened Feb 28, 2017
Overload signatures must all be ambient or non-ambient. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/reflect-metadata#61 · 7 comments · 1 reaction · Opened Feb 27, 2017
Reflect.getMetadata is not a function Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

microsoft/reflect-metadata#44 · 6 comments · Opened Sep 16, 2016
reflect-metadata with an angular rc5 app error localhost/:24 Error: TypeError: Cannot read property 'type' of null(…) Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

microsoft/reflect-metadata#42 · 7 comments · 2 reactions · Opened Aug 22, 2016
Losing metadata Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/reflect-metadata#41 · 2 comments · Opened Aug 14, 2016

microsoft/reflect-metadata

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