Yes, but most people aren't making web browsers or similar.
Web browsers are extremely generalized: they display arbitrary HTML, submit arbitrary forms, download arbitrary images, download and run arbitrary JS/CSS.
Most APIs are intended for more specific uses than "all of HTML". Hypermedia is very useful for browsers, but I wouldn't extend that to say, my Imgur clone API.
Web browsers are extremely generalized: they display arbitrary HTML, submit arbitrary forms, download arbitrary images, download and run arbitrary JS/CSS.
Most APIs are intended for more specific uses than "all of HTML". Hypermedia is very useful for browsers, but I wouldn't extend that to say, my Imgur clone API.