HTML validation is of great value when debugging, even javascript. It can discover things that are easy to miss like unclosed tags and repeated ids.
It is difficult to write a whole website, validate it and fix the errors and at this point validating has little value. However by validating periodically you are getting more out of the tools available. I don't force myself to write 100% strict HTML, but minimizing the validation errors means that I will have less to read when it's time to.
It is difficult to write a whole website, validate it and fix the errors and at this point validating has little value. However by validating periodically you are getting more out of the tools available. I don't force myself to write 100% strict HTML, but minimizing the validation errors means that I will have less to read when it's time to.