If you need to display dynamic data in your HTML document, it will take a lot of work to edit the HTML each time the data changes. Speed. Advantages of using JavaScript include ease of syntax, versatility, processing speed and access to extensive JavaScript libraries in the public domain. There are hundreds of frameworks out there, so be sure to choose very carefully, if you plan to make use of one in the future. HTML is easy enough to write, but errors can be costly. The HTML