Function joinRel

runtime/src/specs.js:27–42

(base, target)

};

export const joinRel = (base, target) => {
    if (target.includes('://') || target.startsWith('/')) return target;
    if (base.includes('://')) return new URL(target, base).toString();
    let b = base, t = target;
    while (t.startsWith('../')) {
        const p = parentDir(b); b = p == null ? '' : p;
        t = t.slice(3);
    }
    if (t === '..') { const p = parentDir(b); return p == null ? '' : p; }
    if (t === '.' || t === '') return b;
    if (b !== '') {
        while (t.startsWith('./')) t = t.slice(2);
        if (!b.endsWith('/')) b += '/';
    }
    return b + t;
};