Eslint Plugin Prefer Let

What does XO think about considering eslint-plugin-prefer-let? https://www.npmjs.com/package/eslint-plugin-prefer-let

Usage of the const keyword to bind an intermediate value of a computation places emphasis on the compiler and and its role in ensuring that a reference never changes. By contrast using let in the same situation reads, in plain English, the programmer’s intent to declare a name value binding.

It is this plugin’s opinion that preventing reassignment of let bindings is better accomplished as a linting rule.

I know this is typically not thought of as a “best practice”, but it is an interesting consideration and I thought it might be a happy addition to XO 😉

[pvdlg]

That’s mostly likely an issue to report on eslint-plugin-prefer-let. If the plugin has conflicts with other eslint rules, they should mention it in the doc so users could disable the problematic rules.

[pvdlg]

Thanks for the suggestion.

This plugin and the rule it enforces seems very very opinionated and far from being something widely accepted as a good practice. Therefore we most likely won’t add it in XO.

As you notice you can use it via configuration. As mentioned in the plugin documentation you have to use the plugin and the rule:

"xo": {
    "plugins": ["prefer-let"],
    "rules": {
        "prefer-let/prefer-let": 2
    }
}