What's the difference between IDs & Classes? | HTML, CSS & JavaScript
When developing a website or web application, it's important to keep in mind the difference between an ID and a Class, and to know when to use each one and why.
The primary thing to remember about this is that you should be using an ID for a unique element that only exists once on the document whereas classes are more appropriate for multiple elements that serve the same purpose.
In this video I take you through this topic and how it affects not only your HTML markup but also your CSS code and JavaScript.
For your reference, check this out:
https://css-tricks.com/the-difference...
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