I wasn't confused at all. Technically there is a difference between a language, an API and a platform. That's all true in the case of NodeJS and the like, but

I wasn't confused at all. Technically there is a difference between a language, an API and a platform. That's all true in the case of NodeJS and the like, but not true for web browsers. There the language the API and the platform come as one. The result is, remote websites can execute code on a users computer. With no control except for simple technical measures.