In the beginning the served content was static. At the end of 1995 the Netscape browser changed this by supporting two different languages, Java and their own scripting language which was the start of JavaScript. With the rise of smart internet connected devices, the web browser is not the only way of presenting your content to the end user. Apps and voice controlled smart devices are other ways of getting content to them.
Somersoft has worked with the following JavaScript libraries.
jQuery
A mature library.
React
Facebook library and preferred by Drupal for administration interfaces.
Graphical
D3, Highcharts and Raphael JavaScript graphical libraries.