JavaScript’s built-in objects include Object, JSON, console, String, Math, Date, and the window and global objects. These are some of the most important and useful parts of the JavaScript language.

What is JSON-LD? JSON-LD (JavaScript Object Notation for Linked Data) extends the JSON format to include linking information. The extension has a wide range of uses from knowledge graphs to SEO.

Javascript Java Rust Python C# Typescript Ruby Erlang / Elixir Go PHP Four key benefits of JSON LD Low-code techniques such as JSON LD have the potential to transform the performance of your web pages ...

But JSON-LD has all the ingredients for high rankings. In my opinion it makes sense to upgrade to JSON-LD and be on the right side with Google. Read the W3Techs.com survey here.