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Home/ Questions/Q 6972571
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T16:59:12+00:00 2026-05-27T16:59:12+00:00

How can I make a bright effect when a textbox is focused? Twitter ‘s

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How can I make a bright effect when a textbox is focused?

Twitter‘s login page has implemented the brightening text boxes already.

I wonder the way to implement it.

Any ideas? pure CSS? or some javascript to handle focus event and addClass removeClass with it?

I prefer jQuery way of implementing javascript stuffs rather than implementing with pure javascript 🙂

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  1. Editorial Team
    Editorial Team
    2026-05-27T16:59:13+00:00Added an answer on May 27, 2026 at 4:59 pm

    Twitter implements this with a simple CSS3 box-shadow:

    input:focus {
        box-shadow: 0 -1px 0 rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.1) inset, 0 0 10px rgba(255, 255, 255, 0.9)
    }
    

    There is no Javascript needed to handle style changes when focusing an element.

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