Abstract classes will still import the value for a computed property at runtime

TypeScript Version: 3.7.0-dev.20190920

abstract class import computed property
abstract class computed property imports for runtime

Code
sharedSymbol.ts

export const sharedSymbol: unique symbol = Symbol();

AbstractClass.ts

import { sharedSymbol } from "./sharedSymbol";

abstract class AbstractClass {
    public abstract [sharedSymbol]: string;
}

Expected behavior:
sharedSymbol.js is not imported by AbstractClass.js
Actual behavior:
The symbol is imported by AbstractClass.js despite it's use being omitted due to it's abstract nature

Playground Link: Unavailable due to the bug being related to imported values.

Related Issues: No, I did not find any

Have a try with new import type syntax 🤔

Have a try with new import type syntax 🤔

This works properly.

In Typescript 5.9.3 this issue still exists but can be worked around by using import type {} syntax instead of import {} syntax.
I've attached a copy of my reproduction of this bug since playground still doesn't appear to have multi-file support (or if it does I can't find it).
~~typescript-bug-33525-2025-10-24.zip~~
Edit: see my followup comment.

In the test case I uploaded to my above comment, I accidentally had verbatimModuleSyntax set to true.
The bug still exists even when I disable that.
Here's the new reproduction:
typescript-bug-33525-2025-10-25.zip

fix: abstract properties are now properly elided from imports

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Abstract classes will still import the value for a computed property at runtime #33525

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Abstract classes will still import the value for a computed property at runtime #33525

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Jack-Works commented on Mar 24, 2020

puppy0cam commented on Aug 21, 2020

puppy0cam commented on Oct 24, 2025

puppy0cam commented on Oct 25, 2025

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