Get types like string, number, null, or custom classes at runtime. V8 can now collect type information. V8 is Google’s open source JavaScript engine. Chrome, Node.js, and many other applications use V8. This type profiler is built into the engine, the information is not statically inferred. JavaScript is a dynamically typed language. But most code is written with fixed types in mind. When debuggin
![Runtime type information for JavaScript](https://cdn-ak-scissors.b.st-hatena.com/image/square/133fbace8393020ebc5eb8902c05e8442ffac1ef/height=288;version=1;width=512/https%3A%2F%2Fmiro.medium.com%2Fv2%2Fresize%3Afit%3A1128%2F1%2ACLdktAPyagGXXZQYUS5UtA.png)