What patents can be applied for web development?

Yes, BS software developed with HTML5 can be patented, but only if it is not exactly the same as others!

Computer software copyright refers to all kinds of exclusive rights enjoyed by software developers or other rights holders in accordance with the relevant copyright law. As far as the nature of rights is concerned, it belongs to a kind of civil rights and has the same characteristics as civil rights.

Copyright is an exception in intellectual property rights, because the acquisition of copyright does not need to be confirmed separately, which is also the principle of "automatic protection" that people often say. After the software is registered, the software copyright owner enjoys the rights of publication, developer status, use, license and remuneration.