teleclimber Posts

teleclimber

•Created by teleclimber on 2/1/2025 in #help

How to initialize global variable so it can be accessed without globalThis?

I'm hacking on a large existing codebase using Deno. This codebase uses a number of global variables like this:

if( __DEV__ && ... )

if( __DEV__ && ... )

Their build system sets these values at build time I think. I am trying to hack around without building, but I am stuck because I haven't figured out how to initialize these variables globally. I always get an error of "ReferenceError DEV is not defined". The code I'm working with uses ESM modules and TypeScript. There is a global.d.ts that sets

declare var __DEV__: boolean

declare var __DEV__: boolean

I include this global.d.ts via deno.json:

"compilerOptions": {
        "types": [
            "./global.d.ts"
        ]
    },

"compilerOptions": {
        "types": [
            "./global.d.ts"
        ]
    },

This makes the TS side of things happy. But I still don't know how to actually initialize that value. I tried globalThis, window, and just DEV = true; Any help would be appreciated, thanks!

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