Classes & IDs

The class attribute is for reusable styles. The id attribute is for a unique element.

html

<div id="header">Unique Header</div>
<p class="error">Error Message 1</p>
<p class="error">Error Message 2</p>

IDs must be unique within the page. Classes can be used on multiple elements.

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The class attribute is for reusable styles. The id attribute is for a unique element.

html

<div id="header">Unique Header</div>
<p class="error">Error Message 1</p>
<p class="error">Error Message 2</p>

IDs must be unique within the page. Classes can be used on multiple elements.

11 / 18