That's not so sure, there are legacy browsers using an embedded mode for bdi as they don't implement the isolation mode (the older version of the BiDi algorithm).
2017-07-17 4:42 GMT+02:00 Martin J. Dürst <due...@it.aoyama.ac.jp>: > On 2017/07/17 04:28, Philippe Verdy via Unicode wrote: > > The isolation mode is also the one strongly recommended by default for >> <bdi> elements in HTML, >> > > Well, that's for sure, because the "i" in "bdi" stands for "isolation", > and the element was newly created for the isolation mode. > > Regards, Martin. > > > but legacy browsers still don't have support for >> isolation mode and were mapping <bdi> element by default using the legacy >> embedding mode which has such caveats. So the specification is correct, it >> reproduces the legacy behavior as it was initially defined (and did not >> change) for RLE/PDF. >> >