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Websites should always make the current page focus clear. This helps anyone using keyboards, those with short attention spans, and likely others.

The default focus state is a dotted outline around the element, and most interactive elements (like buttons and hyperlinks) already have them. Don't remove them just because you don't like them! You can change the style if you want, but removing them is bad practice and breaks the WCAG 2.1 guidelines. This is like taking a mouse-user's mouse away entirely.

Customizing Focus #

The browser defaults of dotted outlines usually work well for their contrast, but they can be customized for better, more stylized effect. All you need is the :focus selector.

a {
border-width: 0px;

transition: border-width 0.5s;

a:focus {
background-color: gray;
border-width: 3px;

transition: border-width 0.5s;

Yes, they can include transitions. Accessibility can have style too!