Method add

packages/cloudflare-worker/src/headers.ts:27–35

(...types: (keyof typeof source)[])

    }

    add(...types: (keyof typeof source)[]): Headers {
        for (const type of types) {
            for (const [key, value] of Object.entries(source[type])) {
                this.set(key, value);
            }
        }

        return this;
    }
}