Easy to start
Even basic knowledge of the language is enough to add some smartness to your site.
Immediately visible changes
One script, many browsers
Nowadays, we have the ability to prepare one script that will be interpreted identically regardless of the browser. Ten years ago such a situation would not have been obvious.
One script, many devices?
Today’s standard for the web is RWD, which means that our webpages are displayed correctly regardless of the device and browser.
Many changes were introduced by bottom-up initiatives, developers creating libraries and frameworks and implementing solutions improving and extending the language, later transferred to the engine.