Forgetting to Close a Tag

This is very common, especially in beginners. Several tags require closing tags such as divs, strong tags, and links to name a few. Other tags require a closing slash to end the line such as an img tag.

Text inside the div.

Improperly nesting tags

It’s very important to open and close tags in the proper order. Once something (for example a div) has opened, it must close before anything above it can close. The following is incorrect.







Capitalizing tags

This is just considered bad practice, but won’t result in your code not being validated. You should always use lowercase for tags like divs, links, and images. The following is incorrect.







Forgetting to open or close quotes

I’ve seen this a lot in beginners and will result in broken code and things not functioning properly. HTML requires double quotes that open and close correctly. Here’s an example of correct usage.