Positioning pop-up windows using Javascript and CSS techniques

In my web application, there is a search field that allows users to enter tags for searching. The window should pop up directly below the search field as shown in this image: Image

I am trying to figure out how the window positioning is actually done. Is it achieved through using a hidden div with absolute positioning and z-index? I'm particularly interested in learning about common approaches using Vanilla Javascript, HTML5, and CSS.

Answer №1

The recommendation box functions as an autocomplete feature. If you prefer, you can utilize the jQuery Token Input created by James Smith ()

In terms of the vertical alignment:

It's simply a matter of aligning it to the bottom of the input field, which can be achieved using only CSS.

input {
  width: 50%;
}

.spanClass {
  display: none;
}

.focusAlign input[type="text"]:focus~.spanClass {
  display: block;
  width: 50%;
  box-sizing: border-box;
  position: absolute;
  top: 29px;
  left: 8px;
  background: #333;
  padding: 3px;
  font: .75em sans-serif;
  color: #eee;
}
<div class="focusAlign">
  <input id="same" type="text" value="" />
  <span class="spanClass">
    <p>Oh, this is a suggestion.</p>
    <p>Yeah, well, so am I.</p>
    <p>Me, too!</p>
    <p>Whatever, I'm here.</p>
  </span>
</div>

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