In my code, TypeScript is only used to provide type hints for developers, without participating in the compilation checks.

Maybe using window is simpler, but I prefer globalThis.

To avoid them polluting each other's globalThis.I want to know if it's possible to do this.

I want to attach types to globalThis, but the scope should be limited to a single file only.

File1.vue

<script setup lang="ts">
declare global {
    var arrayOne: string[]
    var arrayTwo: string[]
}

// globalThis.arrayThree   X any type ts-plugin(7017)
</script>

<template>
</template>

File2.vue

<script setup lang="ts">
declare global {
    var arrayOne: number[]
    var arrayThree: number[]
}

// globalThis.arrayTwo   X any type ts-plugin(7017)
</script>

<template>
</template>