The height and width attributes of the element should match the pixel dimensions of the graphic, or the graphic should be resized to match the height and width set in the HTML. If a graphic is bigger than the assigned image attributes, you’re showing the user less than they are downloading. If the graphic is smaller than what is assigned, then the image will scale up and look pixelated. In any case, when web browsers resize images, it does not look ideal.

If a class name you have selected is very similar to an HTML element name, this often indicates that your HTML can be more semantic. Use <footer>I am a footer</footer>¬†instead of <div class=”footer”>I am a footer</div>.

Code such as <h1 class=”largeHeading”>Title</h1> is redundant since h1 means “largeHeading.” A preferable class name would be more specific and indicate how the heading is used. For example,¬†<h1 class=”masthead”>Title</h1>, would indicate both how and where the class is used.