vendure/shared/normalize-string.ts

/**
 * Normalizes a string to replace non-alphanumeric and diacritical marks with
 * plain equivalents.
 * Based on https://stackoverflow.com/a/37511463/772859
 */
export function normalizeString(input: string, spaceReplacer = ' '): string {
    return input
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .toLowerCase()
        .replace(/[!"£$%^&*()+[\]{};:@#~?\\/,|><`¬]/g, '')
        .replace(/\s+/g, spaceReplacer);
}