string object

@nick/is/string-object

isStringObject

Signature

function isStringObject(it: unknown): it is String;

Checks if a value is a string object, which is a boxed-primitive string that was created via the new String() constructor, or by wrapping a primitive string in the Object() wrapper function.

Boxed primitives are strongly discouraged in JavaScript, as they can lead to all sorts of unexpected behavior and performance issues. As such, this function - and the other boxed primitive functions like it - are provided for your convenience, to help you easily ensure your code is not on the receiving end of such behavior.

Parameters

Name	Info
it	The value to check.

Returns

true if the value is a string object; otherwise, false.

Category

Boxed Primitives

Examples

import { isStringObject } from "jsr:@nick/is/string-object";

isStringObject(new String("abc")); // true
isStringObject(Object("abc")); // true

isStringObject("abc"); // false
isStringObject("abc" as unknown); // false