Edge Computing in Modern E-Commerce Infrastructure

Cloudflare Worker HTML Rewriter Example

// Cloudflare Worker Dynamic HTML Rewriter for A/B Testing
export default {
  async fetch(request) {
    const response = await fetch(request);
    const cookie = request.headers.get('Cookie') || '';
    const variant = cookie.includes('ab_group=B') ? 'Variant B' : 'Variant A';

    return new HTMLRewriter()
      .on('span.hero-cta-text', {
        element(el) {
          el.setInnerContent(variant);
        }
      })
      .transform(response);
  }
};