HTML-CSS: Popout menu

Last update on May 28 2022 07:25:40 (UTC/GMT +8 hours)

HTML-CSS : Exercise-23 with Solution

Using HTML, CSS reveals an interactive popout menu on hover/focus.

Use left: 100% to move the popout menu to the right of the parent.
Use visibility: hidden to hide the popout menu initially, allowing for transitions to be applied (unlike display: none).
Use the :hover, :focus and :focus-within pseudo-class selectors to apply visibility: visible to the popout menu, displaying it when the parent element is hovered/focused.

HTML Code:

<!--License: https://bit.ly/3GjrtVF-->
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Using HTML, CSS reveals an interactive popout menu on hover/focus</title>
</head>
<body>
<div class="reference" tabindex="0">
  <div class="popout-menu">w3resource Popout menu</div>
</div>
</body>
</html>

CSS Code:

.reference {
  position: relative;
  background: #CC56FF;
  width: 100px;
  height: 80px;
}

.popout-menu {
  position: absolute;
  visibility: hidden;
  left: 100%;
  background: #FF89CC;
  color: white;
  padding: 16px;
}

.reference:hover > .popout-menu,
.reference:focus > .popout-menu,
.reference:focus-within > .popout-menu {
  visibility: visible;
}

HTML-CSS Editor:

See the Pen html-css-practical-exercises by w3resource (@w3resource) on CodePen.

What is the difficulty level of this exercise?

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HTML-CSS: Tips of the Day

What is the difference between id and class in CSS, and when should I use them?

Example:

<div id="header_id" class="header_class">
Text
</div>

#header_id {font-color:#fff}
.header_class {font-color:#000}

(Note that CSS uses the prefix # for IDs and . for Classes.)

However color was an HTML 4.01 <font> tag attribute deprecated in HTML 5. In CSS there is no "font-color", the style is color so the above should read:

Example:

<div id="header_id" class="header_class">
Text
</div>

#header_id {color:#fff}
.header_class {color:#000}

The text would be white.

Ref: https://bit.ly/39Stv4P