[Webkit-unassigned] [Bug 204138] Using text-rendering:optimizeLegibility causes IME issues (e.g. Japanese input)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204138

--- Comment #3 from Kari Matthews <kmatthews at zendesk.com> ---
Apologies if the initial report wasn't clear enough. I've tried to clear things up here.

> On what macOS / iOS / iPadOS did you test this?

Macbook pro, Mojave v10.14.6

I'm adding Japanese in System Preferences > Language and Region, not adding a Japanese keyboard. This bug wouldn't occur with a Japanese keyboard.

> Sorry, I don't understand what you mean by "can't see the code sandbox".

There's a link to a code sandbox in the bog report. I just meant if you couldn't access that link.

> Are you saying that as you type in Japanese, something that was previously visible go away? If so, what exactly is it?

The issue is with entering Japanese characters using an English keyboard. i.e. the character か (ka) is composed of the characters 'k' and 'a'. After inputting the second character ('a') the browser hangs for about 1.5 second before rendering か. As you can imagine this is a pretty bad experience for a user.

You can see a screen recording of what this look like here: https://share.getcloudapp.com/yAu4edeR

Thank you for the questions, please let me know if I can provide any more details that will be helpful.

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