fast-string-compare/dist/index.d.ts

A (much) faster String.prototype.localeCompare

/**
 * Compare two strings. This comparison is not linguistically accurate, unlike
 * String.prototype.localeCompare(), albeit stable.
 *
 * @returns -1, 0 or 1
 */
export declare function compare(a: string, b: string): 0 | 1 | -1;