The 12 top JavaScript frameworks according to the Contentful community are: SvelteKit, Express, NestJS, Nuxt.js, Svelte, AngularJS, Gatsby, Remix, Vue, Astro, React, and Next.js. These frameworks offer various strengths such as simplicity, flexibility, performance, and developer experience. The rankings reflect the diverse preferences of developers who build with Contentful, highlighting the importance of choosing a framework that aligns with their needs and goals.