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constantCase

Converts a string to constant case.

Constant case is a naming convention where each word is written in uppercase letters and separated by an underscore (_). For example, CONSTANT_CASE.

Signature

typescript
function constantCase(str: string): string;

Parameters

  • str (string): The string to convert to constant case.

Returns

(string) The converted constant case string.

Examples

typescript
import { constantCase } from 'es-toolkit/string';

constantCase('camelCase'); // returns 'CAMEL_CASE'
constantCase('some whitespace'); // returns 'SOME_WHITESPACE'
constantCase('hyphen-text'); // returns 'HYPHEN_TEXT'
constantCase('HTTPRequest'); // returns 'HTTP_REQUEST'