#Compatibility

Estimated reading time: 2 minutes

#Runtimes

Kita Html works on Node.js 20.13 and later. Bun is fully supported and uses its native Bun.escapeHTML for faster escaping. Deno is untested but expected to work since the library has no native dependencies.

#TypeScript

TypeScript 6.0 or later is required for full compatibility with the latest type definitions. TypeScript 7.1 or later is recommended, because XSS detection on TypeScript 7 uses the API that ships with 7.1.

@kitajs/html-cli requires Node.js 22 or later.

#Module system

The packages emit CommonJS. ESM consumers can import them with esModuleInterop enabled in tsconfig.json.

#Frameworks

Official framework integrations exist for Fastify (4.x and 5.x) and Express (4.x and 5.x). Elysia supports Kita Html through @elysiajs/html. Kita Html also works with any framework that accepts strings: Hono, Bun's built-in server, AdonisJS, and others. Send the string or stream directly in the response body.

#Browsers

The core HTML string output works anywhere the browser can render HTML. Suspense streaming has a stricter client requirement because the injected replacement script depends on HTMLTemplateElement.content and Element.remove().

In practice, Suspense streaming supports modern evergreen browsers released since late 2015. IE11 is not supported.

#Editors

TypeScript 7 does not load language service plugins, so kita-html check runs as a command. Its tsc output format feeds any editor that parses tsc output, such as VS Code through the $tsc problem matcher. The deprecated TypeScript 6 plugin works in editors that support language service plugins, with the workspace TypeScript selected.