Proposal: Disallow await in loops

[tunnckoCore]

Digging more and more in ESLint rules, i found some good ones which enforces good style and more readable code. This issue is for no-await-in-loop rule - not fixable.

Suggested configuration.

{
  "no-await-in-loop": "error"
}

I believe it is good practice to not do that and ban such things, since each loop iteration is delayed until the entire asynchronous operation completes.

[jprichardson]

👎 there are good reasons to use an await in a for-loop. For example, let's assume you want to make a number of rate-limited HTTP requests. A for-loop using await makes for a very clean way to do this.

[tunnckoCore]

Maybe. I believe we should run tests, to see ecosystem impact and if it is not so big everyone can add disable comment.

[feross]

Duplicate: #737 Please use search before creating new issues.