Type Alias IsLiteral<T>

Example

import type {IsLiteral} from 'type-fest';

// https://github.com/inocan-group/inferred-types/blob/master/src/types/string-literals/StripLeading.ts
export type StripLeading<A, B> =
	A extends string
		? B extends string
			? IsLiteral<A> extends true
				? string extends B ? never : A extends `${B & string}${infer After}` ? After : A
				: string
			: A
		: A;

function stripLeading<Input extends string, Strip extends string>(input: Input, strip: Strip) {
	return input.replace(`^${strip}`, '') as StripLeading<Input, Strip>;
}

stripLeading('abc123', 'abc');
//=> '123'

const str = 'abc123' as string;

stripLeading(str, 'abc');
//=> string
Copy