@naturalcycles/js-lib/dist/string/slugify.js

Standard library for universal (browser + Node.js) javascript

// Credit to (adopted from): https://github.com/sindresorhus/slugify/
export function _slugify(s, opt = {}) {
    opt = {
        separator: '-',
        lowercase: true,
        decamelize: true,
        preserveCharacters: [],
        ...opt,
    };
    if (opt.decamelize) {
        s = decamelize(s);
    }
    const patternSlug = buildPatternSlug(opt);
    if (opt.lowercase) {
        s = s.toLowerCase();
    }
    // based on https://stackoverflow.com/a/23633850/4919972
    // Combining Diacritical Marks
    // https://www.unicode.org/charts/PDF/U0300.pdf
    s = s.normalize('NFKD').replaceAll(/[\u0300-\u036F]/g, '');
    // Detect contractions/possessives by looking for any word followed by a `'t`
    // or `'s` in isolation and then remove it.
    s = s.replaceAll(/([a-zA-Z\d]+)'([ts])(\s|$)/g, '$1$2$3');
    s = s.replace(patternSlug, opt.separator);
    s = s.replaceAll('\\', '');
    if (opt.separator) {
        s = removeMootSeparators(s, opt.separator);
    }
    return s;
}
function buildPatternSlug(options) {
    let negationSetPattern = String.raw `a-z\d`;
    negationSetPattern += options.lowercase ? '' : 'A-Z';
    if (options.preserveCharacters.length > 0) {
        for (const character of options.preserveCharacters) {
            if (character === options.separator) {
                throw new Error(`The separator character \`${options.separator}\` cannot be included in preserved characters: ${options.preserveCharacters}`);
            }
            negationSetPattern += escapeStringRegexp(character);
        }
    }
    return new RegExp(`[^${negationSetPattern}]+`, 'g');
}
function removeMootSeparators(s, separator) {
    const escapedSeparator = escapeStringRegexp(separator);
    return s
        .replaceAll(new RegExp(`${escapedSeparator}{2,}`, 'g'), separator)
        .replaceAll(new RegExp(`^${escapedSeparator}|${escapedSeparator}$`, 'g'), '');
}
function decamelize(s) {
    return (s
        // Separate capitalized words.
        .replaceAll(/([A-Z]{2,})(\d+)/g, '$1 $2')
        .replaceAll(/([a-z\d]+)([A-Z]{2,})/g, '$1 $2')
        .replaceAll(/([a-z\d])([A-Z])/g, '$1 $2')
        // `[a-rt-z]` matches all lowercase characters except `s`.
        // This avoids matching plural acronyms like `APIs`.
        .replaceAll(/([A-Z]+)([A-Z][a-rt-z\d]+)/g, '$1 $2'));
}
// based on: https://github.com/sindresorhus/escape-string-regexp/
function escapeStringRegexp(s) {
    // Escape characters with special meaning either inside or outside character sets.
    // Use a simple backslash escape when it’s always valid, and a `\xnn` escape when the simpler form would be disallowed by Unicode patterns’ stricter grammar.
    return s.replaceAll(/[|\\{}()[\]^$+*?.]/g, String.raw `\$&`).replaceAll('-', String.raw `\x2d`);
}