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Diffstat (limited to 'docs/components/dropdowns.md')
| -rw-r--r-- | docs/components/dropdowns.md | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/components/dropdowns.md b/docs/components/dropdowns.md index 3c68f9453..0be8d4d74 100644 --- a/docs/components/dropdowns.md +++ b/docs/components/dropdowns.md @@ -480,7 +480,9 @@ Add `.disabled` to items in the dropdown to **style them as disabled**. Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the `.show` class on the parent list item. -On mobile devices, opening a dropdown adds a `.dropdown-backdrop` as a tap area for closing dropdown menus when tapping outside the menu, a requirement for proper iOS support. **This means that switching from an open dropdown menu to a different dropdown menu requires an extra tap on mobile.** +{% callout info %} +On touch-enabled devices, opening a dropdown adds empty (`$.noop`) `mouseover` handlers to the immediate children of the `<body>` element. This admittedly ugly hack is necessary to work around a [quirk in iOS' event delegation](https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html), which would otherwise prevent a tap anywhere outside of the dropdown from triggering the code that closes the dropdown. Once the dropdown is closed, these additional empty `mouseover` handlers are removed. +{% endcallout %} Note: The `data-toggle="dropdown"` attribute is relied on for closing dropdown menus at an application level, so it's a good idea to always use it. |