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Instruction
ID Selectors
An ID selector matches an HTML element based on the value of its id
attribute. ID selectors are declared using the pound (#
) symbol. For example, if an element has an id
attribute with the value main-content
:
<div id="main-content">...</div>
you can target that element with CSS, like this:
#main-content {
border: 2px dotted tomato;
}