Select element by Id

• This trick helps you select an element using the ID as a value for an attribute selector to avoid the high specificity of
  the ID selector.

 <div id="element">...</div> 

#element { ... } /* High specificity will override many selectors */

    <div id="exampleID">
        <p>Example</p>
    </div>

   #exampleID {
       width: 20px;
   }

• Note: The HTML specs do not allow multiple elements with the same ID

• Reference: Section 4.12