Question

I was at w3schools.com learning html and their code examples included the word “class” such as <div class="page"> . They didn’t explain it so i needed you guys to. So please define what class in <div class="page"> means.

Answer 1

A class is a non-unique identifier for HTML elements. It can be used in a variety of ways:

---

1. For styling of those elements with CSS.

To apply a group of CSS properties as a pack to all elements of the class.

.page
{
  border: solid 1px #009900;
  padding: 5px;
  color: #000077;
}

You can apply it like this:

<div class="page">

<ul class="page">

Ans so on.

You can also restrict it to only be valid for a specific element type, for example, only for divs:

div.page
{
  /* ... */
}

2. For accessing these elements with JavaScript.

To perform some manipulations with all elements of the class. Like this:

$('.advancedOption').attr("disabled", true);

3. For some internal operations in browser. Beyond the scope of this question.