Two good articles explaining the why's and wherefore's of the HTML Button element. When to use it, when not to use it, and how to avoid using the wrong elements with your JS click events.

https://www.nczonline.net/blog/2013/01/29/you-cant-create-a-button/

https://css-tricks.com/use-button-element/ Read more about When To Use an HTML Button

I love HTML5 and all its wonderful, new little attributes that make the life of the developer easier and more enjoyable. For example, the placholder attribute, which you can use on text input fields in forms. Why is it great? Because it allows you to place a label inside the form that automatically disappears when the user starts typing text in it. Before HTML5, everyone was doing this, yes, but you had to include javascript to make it work. Not so with HTML5! Now the placeholder attribute has all that UX goodness for you, right in the browser, no js necessary. Read more about jQuery Fallback for HTML5 Placeholder Attribute

From the Wold Wide Web Consortium (W3C): "HTML5 defines a new element which specifies a standard way to embed an audio file on a web page: the <audio> element." Here are some useful/interesting HTML5 audio/video players: Read more about HTML5 Audio and Video