Symbol.equal protocol

💡 Ideas
1 
class Sample {
   constructor(value) {
      this.#internal = value
   }

   [Symbol.equal](input) {
      if (input instanceof Sample) {
          return this.#internal === input.#internal
      }
      return false
   }
}

const foo = new Sample(1)
const bar = new Sample(1)

foo === bar // here change `Strict Equality Comparison` semantics?
Object.is(foo, bar) // ?
// or new grammar?

References:

In general this seems like a good goal, and assuming we have a Symbol protocol, would be relatively trivial to achieve.

This idea from @ljharb (email conversation)

2

This is an existing proposal:
https://github.com/tc39/proposal-array-equality

1 Like
3

The proposal only Array?

8

That’s a stage 2 question - proposals before that are focusing on problems to solve. However, there would likely have to be a protocol to solve the desired problem with arrays.

1 Like