Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

https://github.com/theKashey/vue-focus-lock

It is a trap! A lock for a Focus. A11y util for scoping a focus.
https://github.com/theKashey/vue-focus-lock

Last synced: about 2 months ago
JSON representation

It is a trap! A lock for a Focus. A11y util for scoping a focus.

Lists

README 

        
# vue-focus-lock

It is a trap! We got your focus and will not let him out!



[![NPM](https://nodei.co/npm/vue-focus-lock.png?downloads=true&stars=true)](https://nodei.co/npm/vue-focus-lock/)



----



- __Vue3 users__ - use v3+ `vue-focus-lock@3`

- __Vue2 users__ - use v2+ `vue-focus-lock@2`



----



This is a small, but very useful for:

 - Modal dialogs. You can not leave it with "Tab", ie tab-out.

 - Focused tasks. It will always brings you back.

 

You have to use it in _every_ modal dialog, or you `a11y` will be shitty.

 

# How to use

Just wrap something with focus lock, and focus will be `moved inside` on mount.

```html



 You can not leave this form

 

 

```

 Demo - https://codesandbox.io/s/l5qlpxqvnq



# WHY?

From [MDN Article about accessible dialogs](https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Techniques/Using_the_dialog_role):

 - 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](https://medium.com/@antonkorzunov/its-a-focus-trap-699a04d66fb5).    



# 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 `last`, 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](https://github.com/theKashey/vue-focus-lock/issues/2).

  - `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



    ...

 

```



# How it works

 Everything thing is simple - vue-focus-lock just dont left focus left boundaries of component, and

 do something only if escape attempt was succeeded.

 

 It is not altering tabbing behavior at all. We are good citizens.



# Licence

 MIT