I decided to understand the discord.js documentation code and test it. Replaced everything you need, while an error appears in the console, and the page remains blank.
marked.js:2597 Uncaught (in promise) Error: marked(): input parameter is undefined or null
at marked (marked.js:2597)
at markdown (markdown.ts:30)
at ClassEvent.vue:64
at ComputedRefImpl.reactiveEffect [as effect] (reactivity.esm-bundler.js:42)
at ComputedRefImpl.get value [as value] (reactivity.esm-bundler.js:864)
at unref (reactivity.esm-bundler.js:778)
at Object.get (reactivity.esm-bundler.js:781)
at Proxy._sfc_render (ClassEvent.vue:32)
at renderComponentRoot (runtime-core.esm-bundler.js:1166)
at componentEffect (runtime-core.esm-bundler.js:5201)
I checked everything on the local machine.