> For the complete documentation index, see [llms.txt](https://docs.angular-package.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.angular-package.dev/type/is.md).

# is

- [isArray()](https://docs.angular-package.dev/type/is/isarray.md)
- [isBigInt()](https://docs.angular-package.dev/type/is/isbigint.md)
- [isBoolean()](https://docs.angular-package.dev/type/is/isboolean.md)
- [isBooleanObject()](https://docs.angular-package.dev/type/is/isbooleanobject.md)
- [isBooleanType()](https://docs.angular-package.dev/type/is/isbooleantype.md)
- [isClass()](https://docs.angular-package.dev/type/is/isclass.md)
- [isDate()](https://docs.angular-package.dev/type/is/isdate.md)
- [isDefined()](https://docs.angular-package.dev/type/is/isdefined.md)
- [★ isFalse()](https://docs.angular-package.dev/type/is/isfalse.md)
- [isFunction()](https://docs.angular-package.dev/type/is/isfunction.md)
- [isInstance()](https://docs.angular-package.dev/type/is/isinstance.md)
- [isKey()](https://docs.angular-package.dev/type/is/iskey.md)
- [isNull()](https://docs.angular-package.dev/type/is/isnull.md)
- [★ isNumber()](https://docs.angular-package.dev/type/is/isnumber.md)
- [isNumberBetween()](https://docs.angular-package.dev/type/is/isnumberbetween.md)
- [isNumberObject()](https://docs.angular-package.dev/type/is/isnumberobject.md)
- [isNumberType()](https://docs.angular-package.dev/type/is/isnumbertype.md)
- [isObject()](https://docs.angular-package.dev/type/is/isobject.md)
- [isObjectKey()](https://docs.angular-package.dev/type/is/isobjectkey.md)
- [isObjectKeyIn()](https://docs.angular-package.dev/type/is/isobjectkeyin.md)
- [isObjectKeys()](https://docs.angular-package.dev/type/is/isobjectkeys.md)
- [isObjectKeysIn()](https://docs.angular-package.dev/type/is/isobjectkeysin.md)
- [isObjectSomeKeys()](https://docs.angular-package.dev/type/is/isobjectsomekeys.md)
- [isPrimitive()](https://docs.angular-package.dev/type/is/isprimitive.md)
- [isRegExp()](https://docs.angular-package.dev/type/is/isregexp.md)
- [★ isString()](https://docs.angular-package.dev/type/is/isstring.md)
- [isStringIncludes()](https://docs.angular-package.dev/type/is/isstringincludes.md)
- [isStringIncludesSome()](https://docs.angular-package.dev/type/is/isstringincludessome.md)
- [isStringLength()](https://docs.angular-package.dev/type/is/isstringlength.md)
- [isStringLengthBetween()](https://docs.angular-package.dev/type/is/isstringlengthbetween.md)
- [isStringObject()](https://docs.angular-package.dev/type/is/isstringobject.md)
- [isStringType()](https://docs.angular-package.dev/type/is/isstringtype.md)
- [isSymbol()](https://docs.angular-package.dev/type/is/issymbol.md)
- [★ isTrue()](https://docs.angular-package.dev/type/is/istrue.md)
- [isType()](https://docs.angular-package.dev/type/is/istype.md)
- [isUndefined()](https://docs.angular-package.dev/type/is/isundefined.md)