JavaScript's New Superpower: Explicit Resource Management

Re:JavaScript's New Superpower: Explicit Resource Management by zdragnar on Saturday May 17, 2025 @11:01AM (#44014825)

Dynamic keys (square brackets on the left hand side in an object literal) have been around for nearly 10 years, if memory serves.

https://www.samanthaming.com/tidbits/37-dynamic-property-nam...

Also in the example is method shorthand:

https://www.samanthaming.com/tidbits/5-concise-method-syntax...

Since symbols cannot be referred to by strings, you can combine the two.

Basically, there isn't any new syntax here.

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Re:JavaScript's New Superpower: Explicit Resource Management by a4isms on Saturday May 17, 2025 @01:26PM (#44015729)

Yes, this will be familiar to people creating objects or classes that are intended to represent iterable collections. You do the same dynamic key syntax with a class declaration or object literal, but use `Symbol.iterator` as the well-known symbol for the method.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...

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