When Fridman says JavaScript runs the world, in other words, what he means is that our world is, like the underlying source code, massively screwed up and incomprehensible.

However, the team cautioned that excitement around JavaScript functionality can lead to overuse. While JavaScript is practical in many cases, it’s not the best choice for every part of a website.

Why JavaScript Can Be A Problem We know that to ingest information, Googlebot will discover a page, crawl it, parse and index it. For JavaScript, the crawler needs to “render” the code.