> 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/guard.md).

# Guard

- [guardArray()](https://docs.angular-package.dev/type/guard/guardarray.md)
- [guardBigInt()](https://docs.angular-package.dev/type/guard/guardbigint.md)
- [guardBoolean()](https://docs.angular-package.dev/type/guard/guardboolean.md)
- [guardClass()](https://docs.angular-package.dev/type/guard/guardclass.md)
- [guardDate()](https://docs.angular-package.dev/type/guard/guarddate.md)
- [guardDefined()](https://docs.angular-package.dev/type/guard/guarddefined.md)
- [★ guardFalse()](https://docs.angular-package.dev/type/guard/guardfalse.md)
- [guardFunction()](https://docs.angular-package.dev/type/guard/guardfunction.md)
- [guardInstance()](https://docs.angular-package.dev/type/guard/guardinstance.md)
- [guardKey()](https://docs.angular-package.dev/type/guard/guardkey.md)
- [guardNull()](https://docs.angular-package.dev/type/guard/guardnull.md)
- [guardNumber()](https://docs.angular-package.dev/type/guard/guardnumber.md)
- [guardNumberBetween()](https://docs.angular-package.dev/type/guard/guardnumberbetween.md)
- [guardObject()](https://docs.angular-package.dev/type/guard/guardobject.md)
- [guardObjectKey()](https://docs.angular-package.dev/type/guard/guardobjectkey.md)
- [guardObjectKeyIn()](https://docs.angular-package.dev/type/guard/guardobjectkeyin.md)
- [guardObjectKeys()](https://docs.angular-package.dev/type/guard/guardobjectkeys.md)
- [guardObjectKeysIn()](https://docs.angular-package.dev/type/guard/guardobjectkeysin.md)
- [guardObjectSomeKeys()](https://docs.angular-package.dev/type/guard/guardobjectsomekeys.md)
- [guardPrimitive()](https://docs.angular-package.dev/type/guard/guardprimitive.md)
- [guardRegExp()](https://docs.angular-package.dev/type/guard/guardregexp.md)
- [★ guardString()](https://docs.angular-package.dev/type/guard/guardstring.md)
- [guardStringIncludes()](https://docs.angular-package.dev/type/guard/guardstringincludes.md)
- [guardStringIncludesSome()](https://docs.angular-package.dev/type/guard/guardstringincludessome.md)
- [guardStringLength()](https://docs.angular-package.dev/type/guard/guardstringlength.md)
- [guardStringLengthBetween()](https://docs.angular-package.dev/type/guard/guardstringlengthbetween.md)
- [guardSymbol()](https://docs.angular-package.dev/type/guard/guardsymbol.md)
- [★ guardTrue()](https://docs.angular-package.dev/type/guard/guardtrue.md)
- [guardType()](https://docs.angular-package.dev/type/guard/guardtype.md)
- [guardUndefined()](https://docs.angular-package.dev/type/guard/guardundefined.md)