The function Reflect.Decorate does not exist

As I dive into the codebase of a new program, I encountered an issue related to a DecorateAndBind function. During testing, an error message popped up saying "TypeError: Reflect.decorate is not a function". This error seemed unfamiliar and not something written by our team, prompting me to investigate further.

Upon inspection, I found out that the program utilizes a decorate function from the Inversify module at some point. Specifically, it references 

node_modules/inversify/dts/annotation/decorator_utils.d.ts
. Looking at the corresponding .js file, it seems to be using Reflect.decorate, which leads back to another module called 
node_modules/typescript/lib/lib.es2015.reflect.d.ts
. Surprisingly, Reflect.decorate is not declared in this file.

How can I resolve this error without directly modifying node_modules files? Could it be an issue with the initial call to the decorate function in Inversify?

typescriptdecoratornode-modulesinversifyjs

Answer №1

I noticed that you brought up the idea of installing reflect-metadata, but have you remembered to include the import statement as well? import "reflect-metadata";

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