How do JavaScript collections work across different environments?

Can you explain how JavaScript collections like Set and Map work in different environments?

Sure! JavaScript collections such as Set and Map are part of the ECMAScript 2015 (ES6) specification. They are designed to work consistently across modern environments like browsers and Node.js.

Are there any compatibility issues I should be aware of when using these collections?

Yes, while most modern environments support Set and Map, older browsers like Internet Explorer do not. It's important to check compatibility if you're targeting those.

What about performance differences between environments?

Performance can vary based on the implementation of the JavaScript engine. Generally, Node.js may have optimizations that differ from browsers, but for most use cases, the differences are minimal.

How can I ensure my code is compatible with older environments?

You can use transpilers like Babel to convert your ES6 code into ES5, which is widely supported. Additionally, consider using polyfills for features not available in older environments.