How to Add Text Suffixes to Number Inputs for Visual Differentiation?

Appending Text Suffixes to Number Inputs

In a typical scenario, number inputs like convey a value in milliseconds. However, with multiple number inputs indicating values in dB or percentages, it becomes necessary to differentiate these values visually. Adding a text suffix clarifies the type of value represented.

Solution:

Utilize a wrapper

and position the unit as a pseudo-element ::after with the desired unit text.

Implementation:

<code class="css">/* Prepare wrapper element */
div {
  display: inline-block;
  position: relative;
}

/* Position the unit to the right */
div::after {
  position: absolute;
  top: 2px;
  right: .5em;
  transition: all .05s ease-in-out;
}

/* Adjust unit position on hover and focus */
div:hover::after,
div:focus-within::after {
  right: 1.5em;
}

/* Override for Firefox (arrows always shown) */
@supports (-moz-appearance:none) {
  div::after {
    right: 1.5em;
  }
}

/* Specify abbreviation for each unit class */
.ms::after {
  content: 'ms';
}
.db::after {
  content: 'db';
}
.percent::after {
  content: '%';
}</code>

<code class="html"><div class="ms">
  <input type="number" id="milliseconds">
</div>
<hr>
<div class="db">
  <input type="number" id="decibel">
</div>
<hr>
<div class="percent">
  <input type="number" id="percentages">
</div></code>

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