It is a trap! (for a focus)
npm install vue-focus-lock
This is a small, but very useful for:
- Modal dialogs. You can not leave it with "Tab", ie tab-out.
- Focused tasks. It will aways brings you back.
You have to use it in _every_ modal dialog, or you a11y will be shitty.
moved inside on mount.html
You can not leave this form
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Demo - https://codesandbox.io/s/l5qlpxqvnqWHY?
From MDN Article about accessible dialogs:
- The dialog must be properly labeled
- Keyboard __focus must be managed__ correctly
This one is about managing the focus.I'v got a good article about focus management, dialogs and WAI-ARIA.
Behavior
0. It will always keep focus inside Lock.
1. It will cycle forward then you press Tab.
2. It will cycle in reverse direction on Shift+Tab.
3. It will do it using _browser_ tools, not emulation.
4. It will handle positive tabIndex inside form.
5. It will prevent any jump outside, returning focus to the last element.
!! this realisation will not return focus to the original place on Unlock !! You can use nested Locks or have more than one Lock on the page.
Only
, or deepest one will work. No fighting.API
FocusLock has few props to tune behavior, all props are optional:
- disabled, to disable(enable) behavior without altering the tree.
- group='', named focus group for focus scattering aka combined lock targets.
- noFocusGuards=false, disable focus guards - virtual inputs which secure tab index.#### Removing Tailing Guard
FocusLock is adding
Focus Guards before and after lock to remove some side effects, like page scrolling.
If you want to allow user _tab_ into address bar (only if your modal is the last tabbable element on the body),
you might remove the Tailing Guard. To do this, set noFocusGuards prop to tail.
`html
...
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