less/lib/less-browser/utils.js

Leaner CSS

/** @param {string} href */
export function extractId(href) {
    return href.replace(/^[a-z-]+:\/+?[^/]+/, '')  // Remove protocol & domain
        .replace(/[?&]livereload=\w+/, '')        // Remove LiveReload cachebuster
        .replace(/^\//, '')                         // Remove root /
        .replace(/\.[a-zA-Z]+$/, '')                // Remove simple extension
        .replace(/[^.\w-]+/g, '-')                 // Replace illegal characters
        .replace(/\./g, ':');                       // Replace dots with colons(for valid id)
}

/**
 * @param {Record<string, *>} options
 * @param {HTMLElement | null} tag
 */
export function addDataAttr(options, tag) {
    if (!tag) {return;} // in case of tag is null or undefined
    for (const opt in tag.dataset) {
        if (Object.prototype.hasOwnProperty.call(tag.dataset, opt)) {
            if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') {
                options[opt] = tag.dataset[opt];
            } else {
                try {
                    options[opt] = JSON.parse(tag.dataset[opt]);
                }
                catch (_) {}
            }
        }
    }
}