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Fix TypeScript type narrowing issue with isUrlString

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Fixes #212
This commit is contained in:
Sindre Sorhus 2025-09-12 03:58:08 +07:00
parent ef35cc350a
commit c68ad76062
3 changed files with 33 additions and 3 deletions
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8
source/index.ts
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@ -8,6 +8,7 @@ import type {
Predicate,
Primitive,
TypedArray,
UrlString,
WeakRef,
Whitespace,
} from './types.js';
@ -760,7 +761,7 @@ export function isUrlSearchParams(value: unknown): value is URLSearchParams {
return getObjectType(value) === 'URLSearchParams';
}
export function isUrlString(value: unknown): value is string {
export function isUrlString(value: unknown): value is UrlString {
if (!isString(value)) {
return false;
}
@ -894,7 +895,7 @@ type Assert = {
dataView: (value: unknown, message?: string) => asserts value is DataView;
enumCase: <T = unknown>(value: unknown, targetEnum: T, message?: string) => asserts value is T[keyof T];
urlInstance: (value: unknown, message?: string) => asserts value is URL;
urlString: (value: unknown, message?: string) => asserts value is string;
urlString: (value: unknown, message?: string) => asserts value is UrlString;
truthy: <T>(value: T | Falsy, message?: string) => asserts value is T;
falsy: (value: unknown, message?: string) => asserts value is Falsy;
nan: (value: unknown, message?: string) => asserts value is number;
@ -1650,7 +1651,7 @@ export function assertUrlSearchParams(value: unknown, message?: string): asserts
}
}
export function assertUrlString(value: unknown, message?: string): asserts value is string {
export function assertUrlString(value: unknown, message?: string): asserts value is UrlString {
if (!isUrlString(value)) {
throw new TypeError(message ?? typeErrorMessage('string with a URL', value));
}
@ -1705,4 +1706,5 @@ export type {
Predicate,
Primitive,
TypedArray,
UrlString,
} from './types.js';