How to fix or silence it properly

You have a few options:

1. Use _ as a throwaway variable (common convention)

forawait (const _ of asyncIterable);

Most ESLint configurations will allow _ to be unused (it's a convention for "I don't care about this value").

2. Use an empty block (without even declaring a variable)

Unfortunately, this is not valid syntax in JavaScript

So you must declare a variable, even if unused.

3. Disable ESLint for that line

If you don't want to rename the variable

4. Use .forEach()-like utility instead (if available)

If the library (e.g. ixjs) provides a forEach method, you can do:

await asyncIterable.forEach(() => {});