Act as a seasoned SEO content writer with 5+ years of experience in JavaScript-heavy websites. Craft a detailed, 1,500-word blog post titled '[The Impact of JavaScript on SEO: What Developers & Marketers Need to Know]'. Cover key topics like [how search engines crawl and index JavaScript content], [common pitfalls of JS frameworks like React or Angular for SEO], and [best practices to ensure JS-powered sites rank well]. Use real-world examples from [top e-commerce or news sites] to illustrate your points. Include actionable tips for both developers and SEO specialists, and cite the latest Google guidelines. Target audience: [web developers, digital marketers, and CTOs]. Tone: [authoritative yet accessible].