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Add .isBlob() (#162)

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Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>
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Eric（书生） 2022-02-27 15:16:25 +08:00 • committed by GitHub
parent 6cbefb9af7
commit 5b7ea154e6
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3 changed files with 17 additions and 0 deletions
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4
source/index.ts
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@ -34,6 +34,7 @@ const objectTypeNames = [
'Observable',
'Array',
'Buffer',
'Blob',
'Object',
'RegExp',
'Date',
@ -178,6 +179,7 @@ is.array = <T = unknown>(value: unknown, assertion?: (value: T) => value is T):
};
is.buffer = (value: unknown): value is Buffer => (value as any)?.constructor?.isBuffer?.(value) ?? false;
is.blob = (value: unknown): value is Blob => isObjectOfType<Blob>('Blob')(value);
is.nullOrUndefined = (value: unknown): value is null | undefined => is.null_(value) || is.undefined(value);
is.object = (value: unknown): value is object => !is.null_(value) && (typeof value === 'object' || is.function_(value));
@ -470,6 +472,7 @@ interface Assert {
numericString: (value: unknown) => asserts value is string;
array: <T = unknown>(value: unknown, assertion?: (element: unknown) => asserts element is T) => asserts value is T[];
buffer: (value: unknown) => asserts value is Buffer;
blob: (value: unknown) => asserts value is Blob;
nullOrUndefined: (value: unknown) => asserts value is null | undefined;
object: <Key extends keyof any = string, Value = unknown>(value: unknown) => asserts value is Record<Key, Value>;
iterable: <T = unknown>(value: unknown) => asserts value is Iterable<T>;
@ -572,6 +575,7 @@ export const assert: Assert = {
}
},
buffer: (value: unknown): asserts value is Buffer => assertType(is.buffer(value), 'Buffer', value),
blob: (value: unknown): asserts value is Blob => assertType(is.blob(value), 'Blob', value),
nullOrUndefined: (value: unknown): asserts value is null | undefined => assertType(is.nullOrUndefined(value), AssertionTypeDescription.nullOrUndefined, value),
object: (value: unknown): asserts value is object => assertType(is.object(value), 'Object', value),
iterable: <T = unknown>(value: unknown): asserts value is Iterable<T> => assertType(is.iterable(value), AssertionTypeDescription.iterable, value),