The id Selector
The id selector uses the id attribute of the HTML element, and is defined with a "#".
The style rule below will be applied to the element with id="para1":
Example
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* Do NOT start an ID name with a number! It will not work in Mozilla/Firefox.
The class Selector
The class selector uses the class attribute of the HTML element, and is defined with a ".".
The style rule below will be applied to the element with class="center"
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You can also specify that only specific HTML elements should be affected by a class.
In the example below, all p elements with class="center" will be center-aligned:
Example
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