fix-outline

*:focus { outline: none; } done right.

By default, browsers add an outline around your shiny buttons when they are focused:

This is great for keyboard accessibility, but most users don't use keyboard for navigating. The goal of this library is to provide best visual experience for most users, while keeping good keyboard accessibility.

fix-outline disables outline until user actually uses keyboard navigation. It works out of the box with your existing CSS.

This very small library has no dependencies and supports all modern browsers, including IE8+.

Install

npm install fix-outline

Usage

Remove all existing global outline rules like these:

*:focus {
  outline: 0;
}

Then call fixOutline() once in your JS:

var fixOutline = require('fix-outline');
fixOutline();

Now outline is disabled for all focused elements until keyboard navigation is used for the first time.

Advanced usage

fixOutline() automatically adds new CSS rules to your page. You can disable this behavior by setting autoCSS option to false:

var fixOutline = require('fix-outline');
fixOutline({
    autoCss: false
});

That means you need to add some CSS yourself. For example this rule is added when autoCss is enabled:

body:not(.kb-nav-used) *:focus {
  outline: none;
}

How it works

This is shortly how fix-outline works:

• Add new CSS rule which disables outline on elements when .kb-nav-used is not defined for body
• Setup hook, which adds .kb-nav-used class to body when TAB key is pressed

In other words, outline for elements is enabled after user uses keyboard navigation for the first time.

Reasoning behind the implementation:

• Enables accessibility only for the ones using it.
• Fast. Does CSS stylesheet modifications only once and removes event listener. Other implementations keep listening for all mousedown and keydown events.

Usually developers fix this by setting a global *:focus { outline: none; } rule, but they shouldn't.

Resources and other implementations

• http://outlinenone.com/
• http://a11yproject.com/posts/never-remove-css-outlines/
• https://gist.github.com/jensgro/2470777
• https://github.com/lindsayevans/outline.js

License

MIT