JavaScript

JavaScript (JS) is a complex, dynamic programming language used to create highly interactive elements on a webpage, such as pop-ups, infinite scrolling, interactive forms, and dynamic data loading. While JavaScript provides a superior user experience, it is historically the absolute worst enemy of technical SEO. Search engine crawlers (like Googlebot) struggle to execute and render heavy JavaScript. If the core text or internal links of a webpage are hidden behind JS that Google cannot render, the algorithm assumes the page is blank. Enterprise SEO requires implementing Server-Side Rendering (SSR) to ensure the JS is fully executed before Googlebot arrives.

JavaScript Simplified

JavaScript is the code that makes websites interactive and fun, like making animations move or loading new articles as you scroll down. However, Google’s computers are terrible at reading it. If you hide your most important text inside JavaScript, Google might never actually see it.