add variable ignore list for `block-scoped-var`

The version of ESLint you are using. v6.8.0

The problem you want to solve. block-scoped-var does not offer a progressive path to enable this rule. Therefore, users have to fix all existing violations in order to enable this rule. For a large pre-ECMAScript 2015 codebase, it is quite difficult to fix all existing violations and enable this rule all at once.

Your take on the correct solution to problem. Similar to no-unused-vars, have an option to add variables to ignore. By doing this way,

• we don’t make any breaking changes. (not providing variable ignore list will still work as intended)
• we allow users to enable this rule immediately

Are you willing to submit a pull request to implement this change? Yes

[yeonjuan]

Hi @bcko 😃

For a large pre-ECMAScript 2015 codebase, it is quite difficult to fix all existing violations and enable this rule all at once.

I’m not strongly opposed to this proposal. But maybe some alternatives can help you. What about the setting error level with wran or using eslint-disable comment? ( + running cli --max-warning)

[eslint-deprecated[bot]]

Unfortunately, it looks like there wasn’t enough interest from the team or community to implement this change. While we wish we’d be able to accommodate everyone’s requests, we do need to prioritize. We’ve found that issues failing to reach accepted status after 21 days tend to never be accepted, and as such, we close those issues. This doesn’t mean the idea isn’t interesting or useful, just that it’s not something the team can commit to.

Thanks for contributing to ESLint and we appreciate your understanding.