DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
64 lines
2 KiB
Text
64 lines
2 KiB
Text
/**
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Tries to find the type of a global with the given name.
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Limitations: Due to peculiarities with the behavior of `globalThis`, "globally defined" only includes `var` declarations in `declare global` blocks, not `let` or `const` declarations.
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@example
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```
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import type {FindGlobalType} from 'type-fest';
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declare global {
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const foo: number; // let and const don't work
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var bar: string; // var works
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}
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type FooType = FindGlobalType<'foo'> //=> never (let/const don't work)
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type BarType = FindGlobalType<'bar'> //=> string
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type OtherType = FindGlobalType<'other'> //=> never (no global named 'other')
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```
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@category Utilities
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*/
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export type FindGlobalType<Name extends string> = typeof globalThis extends Record<Name, infer T> ? T : never;
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/**
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Tries to find one or more types from their globally-defined constructors.
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Use-case: Conditionally referencing DOM types only when the DOM library present.
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*Limitations:* Due to peculiarities with the behavior of `globalThis`, "globally defined" has a narrow definition in this case. Declaring a class in a `declare global` block won't work, instead you must declare its type using an interface and declare its constructor as a `var` (*not* `let`/`const`) inside the `declare global` block.
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@example
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```
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import type {FindGlobalInstanceType} from 'type-fest';
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class Point {
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constructor(public x: number, public y: number) {}
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}
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type PointLike = Point | FindGlobalInstanceType<'DOMPoint'>;
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```
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@example
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```
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import type {FindGlobalInstanceType} from 'type-fest';
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declare global {
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// Class syntax won't add the key to `globalThis`
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class Foo {}
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// interface + constructor style works
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interface Bar {}
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var Bar: new () => Bar; // Not let or const
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}
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type FindFoo = FindGlobalInstanceType<'Foo'>; // Doesn't work
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type FindBar = FindGlobalInstanceType<'Bar'>; // Works
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```
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@category Utilities
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*/
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export type FindGlobalInstanceType<Name extends string> =
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Name extends string
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? typeof globalThis extends Record<Name, abstract new (...arguments: any[]) => infer T> ? T : never
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: never;
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