isPrimitive

Problem

You need to distinguish primitive values (string, number, boolean) from objects in a generic function.

Solution

Use isPrimitive(value) to narrow to string | number | boolean.

import { isPrimitive } from '@vielzeug/arsenal';

isPrimitive('hello'); // true
isPrimitive(42); // true
isPrimitive(true); // true

isPrimitive(null); // false
isPrimitive({}); // false
isPrimitive([]); // false

Related

• isString
• isNumber
• isBoolean