Self-closed tags aren't a thing in HTML. Either your write invalid HTML or the / has no effect whatsover.
Topic: HTML
Safari enables developers to define a passwordrules HTML property to control and configure autofilling
A summary of ongoing spec discussions regarding container based image loading.
Wouldn't it be wonderful if HTML could speak JSON? Today I learned, there's been a spec that went nowhere, unfortunately.
An accessible example implemenation of a custom element that works without JavaScript.