@appsemble/utils/normalize.js

Utility functions used in Appsemble internally

/**
 * Turn a string into a URL friendly variant by stripping any weird formatting.
 *
 * - Accents are stripped;
 * - Non-alphanumeric is replaced with a hyphen;
 * - The resulting string is lower case.
 *
 * @param input The input string to normalize.
 * @param stripTrailingHyphen Strip a trailing hyphen. Disable for example when processing user
 *   input directly while the user is typing.
 * @returns The normalized string.
 */
export function normalize(input, stripTrailingHyphen = true) {
    const normalized = input
        // Normalize accents. https://stackoverflow.com/a/37511463/1154610
        .normalize('NFD')
        .replaceAll(/[\u0300-\u036F]/g, '')
        // Make it lower case.
        .toLowerCase()
        // Replace any non-alphanumeric with single hyphens them at the start.
        .replaceAll(/[^\da-z]+/g, (match, index) => (index ? '-' : ''));
    return stripTrailingHyphen ? normalized.replace(/-$/, '') : normalized;
}
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