Input with prefix

CSS, Interactivity, Visual · Oct 13, 2021

Creates an input with a visual, non-editable prefix.

  • Use display: flex to create a container element.
  • Remove the border and outline from the <input> field. Apply them to the parent element instead to make it look like an input box.
  • Use the :focus-within pseudo-class selector to style the parent element accordingly, when the user interacts with the <input> field.
<div class="input-box">
  <span class="prefix">+30</span>
  <input type="tel" placeholder="210 123 4567"/>
.input-box {
  display: flex;
  align-items: center;
  max-width: 300px;
  background: #fff;
  border: 1px solid #a0a0a0;
  border-radius: 4px;
  padding-left: 0.5rem;
  overflow: hidden;
  font-family: sans-serif;

.input-box .prefix {
  font-weight: 300;
  font-size: 14px;
  color: #999;

.input-box input {
  flex-grow: 1;
  font-size: 14px;
  background: #fff;
  border: none;
  outline: none;
  padding: 0.5rem;

.input-box:focus-within {
  border-color: #777;

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