Clearer guidance on labels/placeholders/tooltips
Give text fields a label using header capitalization, and assign an access key to the label, to allow people to focus the control using a keyboard.
If there is a little available space, or a label would disrupt the overall visual layout, placeholder text can be shown inside the field instead of using a label.
This sounds like placeholders should be the last resort, with labels being preferred. Yet, the example on the page is all placeholders, no labels to be seen.
What is the thinking here, are labels oldfashioned and best avoided?
I also think it would be good to mention placeholders as an alternative to tooltips, for entries, on the tooltips page.