While the most common scripting language ECMAscript (more widely known as JavaScript) is developed by ECMA, a great many of the APIs made available in browsers have been defined at W3C.
A script is program code that doesn’t need pre-processing (e.g. compiling) before being run. In the context of a Web browser, scripting usually refers to program code written in JavaScript that is executed by the browser when a page is downloaded, or in response to an event triggered by the user. JavaScript powers the dynamic behaviour on most websites.
For a slightly biased idea of the possibilities of JavaScript – have a read of data-flair’s blog:
To get a better understanding of how object-oriented scripting languages work – watch this great video from Craig’n’Dave: https://www.youtube.com/watch?v=9u2XQ1G5DVY (7:40 mins)
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