Can CSS Alone Style a `` Element Based on its Selected ``?

Styling Elements Based on Selected : Is CSS Alone Capable?

Problem: Attempting to style a

element based on the selected using CSS has proven to be a challenge. Unlike option elements, which can be styled directly, styling the selected element remains elusive.

Answer:

CSS alone is not sufficient to style a element based on the selected . However, a clever workaround involving the onchange event and a data attribute assignment can grant you this coveted ability.

Solution:

1. Assign a Value to the data-chosen Attribute:
   On the

element, add an onchange event that assigns the current value to the data-chosen attribute. This makes the selected option's value available to CSS.

Target the Select Element:
Create CSS rules that target the element based on the data-chosen attribute. In this example, the opt3 value is targeted to style the selected option.

<select onchange=" this.dataset.chosen = this.value; ">
    ...
    ...
</select>

select[data-chosen='opt3'] { 
    border: 2px solid red;
}

Note: While this solution provides an effective way to style

elements based on the selected , it may not be widely supported across browsers.

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