I fail to see the claim, well, maybe the title. The article comes across as an opinion to me. You can have your own opinion as well, but I'm not as quick to label your opinion useless as you are to label her's.
I didn't track and keep statistics on the matter, but I have encountered the very thing that author describes. Inputs that used placeholder tended to have more errors than ones that did not. Take the statement for what you want but in my experience I would avoid such things in my future projects.
Using placeholders as labels will not invalidate the HTML, it is a valid thing to do. This is not a debate over the validity of doing such a thing, but whether it's a good idea.
It's not saying that your users are idiots, but sometimes you do have to design/develop for the lowest denominator in the group. But then you always have a level of "can't make everyone happy".
Most cases of UX I've seen suggests that reducing the number of pages in submitting form data increases submission by reducing fatigue, confusion, and frustration. Think disappearing labels might be an issue for someone then find out what happens when the visitor can't remember something they filled in the page before; or worse, three pages ago. If there are too many fields on the page then you're better off trying to reduce the number of fields involved. Maybe get the bare minimum now and ask for more later after the form has been submitted.
I didn't track and keep statistics on the matter, but I have encountered the very thing that author describes. Inputs that used placeholder tended to have more errors than ones that did not. Take the statement for what you want but in my experience I would avoid such things in my future projects.
Using placeholders as labels will not invalidate the HTML, it is a valid thing to do. This is not a debate over the validity of doing such a thing, but whether it's a good idea.
It's not saying that your users are idiots, but sometimes you do have to design/develop for the lowest denominator in the group. But then you always have a level of "can't make everyone happy".
Most cases of UX I've seen suggests that reducing the number of pages in submitting form data increases submission by reducing fatigue, confusion, and frustration. Think disappearing labels might be an issue for someone then find out what happens when the visitor can't remember something they filled in the page before; or worse, three pages ago. If there are too many fields on the page then you're better off trying to reduce the number of fields involved. Maybe get the bare minimum now and ask for more later after the form has been submitted.