The plugin seems to be pretty straightforward: install, activate.
I’ve done both, result:
But there are no tooltips shown 
Not when I’m logged in, not with private browser window and not logged in.
Any idea on how I could debug this?
Maybe my expectation is completely wrong… is this plugin enabled on meta? Because I also don’t see tooltips here as I would expect them with the plugin enabled.
Are you testing on a touchscreen laptop? I suggest testing on a Mac to rule out touchscreen interference.
I didn’t want to buy a Mac only to test this 
But indeed the tooltip appears on a laptop without touchscreen (not on meta though).
It isn’t working on a secondary non-touch display connected to a laptop with touchscreen.
At least some user will profit from the tooltips.
Is the touchscreen issue considered a bug?
hover does work fine on machines that don’t have touchscreens. You get hover with a mouse or touchpad pointer, for example, here is me hovering over the share button:
But for the laptops that have touchscreen and mouse/touchpad… I’m not sure there is a way to detect when the mouse is unplugged versus plugged in.
I don’t know if there’s any way to fix this through CSS4 media detection:
But it would be nice to be able to fix this for devices that show up as both touchscreen and mouse – to allow hover for them. Users have resorted to disabling the touchscreen on their laptop to get it to work, probably because they never use the touchscreen part anyway.
I tested this … Edit fiddle - JSFiddle - Code Playground and got
mouse
touch mouse ← wrong!I also tested Checking device hover capabilities with JavaScript using interaction media features - JSFiddle - Code Playground and same results – the touchscreen + mouse device looks identical to the desktop.
これを修正しました。これにより、ツールチッププラグインのホバーは、マウスで操作する場合、タッチスクリーンデバイス（Chromebook、Surfaceなど）で表示されるようになります。（タッチスクリーンで操作する場合は表示されません。）
サイトをセルフホストしている場合は、最近のプラグインの変更をプルするために再構築してください。
