Given this, I'm particularly sad that MDN uses self-closing tags in its beginner-facing documentation. Edit: Here is the result of that confusion in the wild. "It's consistent with JSX" JSX and HTML are different formats. They aren't consistent with each other. Pretending they're ...
Self-closing mixerdoi:EP0439403 A1EP
Edge 17 (EdgeHTML) already had support when the test was written. It inherited that support when adopting Chromium in 2019. With Opera switching to Chromium in 2013, I would assume that it received patches from upstream Chromium (September 2018) when that bug was fixed. (It is not tested ...