prefer-nullish-coalescing

Prefer nullish coalescing when a nullish value selects a fallback

A conditional that returns a value when it is non-nullish and a fallback otherwise manually implements nullish coalescing.
Instead, you SHOULD use the ?? operator.

- Category: style
- Level: warning
- Fix: automatic
- Scope: module

Reported

function select(value: string | undefined, fallback: string): string {
    return value !== undefined ? value : fallback;
}
Accepted

function select(value: string | undefined, fallback: string): string {
    return value ?? fallback;
}
Prior art

- typescript-eslint · prefer-nullish-coalescing

language/linter/src/rules/style/prefernullishcoalescing.rs:8