refactor(linter/plugins): remove | undefined from optional function params types#15885
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… params types (#15885) `| undefined` in optional function params (e.g. `param?: string | undefined`) is pointless. Remove them.
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| beforeCount?: number | null | undefined, | ||
| afterCount?: number | null | undefined, | ||
| ): string { | ||
| getText(node?: Ranged | null, beforeCount?: number | null, afterCount?: number | null): string { |
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I think we should copy eslint's API and remove | null here.
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Hmm. If ESLint doesn't accept null, then yes I guess we shouldn't either, so that plugins written and tested in Oxlint remain compatible with ESLint. But in a lot of cases, ESLint uses !option to check for defined/undefined, so is very liberal indeed. I think ideally we don't want to do that as truthiness checks are somewhat expensive compared to == null (I believe).
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I think ===undefined is probably faster than ==null i would guess?
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Yes. We only use == null where we want to catch either. Wherever possible, we use === undefined or === null.
But if it was me designing a lib, I'd accept either null or undefined to mean "nothing" in all external APIs, and conform the input so we only use null internally.
… params types (#15885) `| undefined` in optional function params (e.g. `param?: string | undefined`) is pointless. Remove them.
… params types (oxc-project#15885) `| undefined` in optional function params (e.g. `param?: string | undefined`) is pointless. Remove them.
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| undefinedin optional function params (e.g.param?: string | undefined) is pointless. Remove them.