input text with dashed border and stroke length equal to the characters

Question

How do I make an input text using CSS, with a dashed bottom border/line that the length of strokes are equal to the length of each character?

Here's an example:

Answer 1

Try using border-bottom: 1px dashed black;

Answer 2

dashed border style doesn't give the exact effect because we cannot control the length of strokes. Instead, we can make the dashed border by using an absolutely positioned pseudo-element behind the input, and specify the space between strokes by letter-spacing property.

input[type="text"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border: 0;
  outline: 0;
  background: transparent;
  width: 12.70em;
  font-size: 1em;
}

.input-wrapper, input[type="text"] {
  font-family: monospace;
  font-weight: bold;
  letter-spacing: .3em;
}

.input-wrapper {
  display: inline-block;
  position: relative;
  overflow: hidden;
  padding-bottom: .2em;
  font-size: 200%;
}

.input-wrapper:after {
  content: "——————————————————————————————";
  line-height: .3em;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: -1;
}

<div class="input-wrapper">
  <input type="text" value="Hello World" maxlength="15">
</div>