# is

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