javascript.builtins.Symbol - Symbol.{dispose, asyncDispose} available in node18.18.0, deno1.37.0 and Safari 18.3

[ikeyan]

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

Nodejs support for Symbol.dispose and Symbol.asyncDispose

What browsers does this problem apply to, if applicable?

Node.js, Deno and Safari

What did you expect to see?

The support was added in the node18.18.0 release.
The support was added in the deno 1.37.0 release.
They are available at least on Safari 18.3

Did you test this? If so, how?

$ asdf install nodejs 18.18.0
$ ~/.asdf/installs/nodejs/18.18.0/bin/node
Welcome to Node.js v18.18.0.
Type ".help" for more information.
> Symbol.dispose
Symbol(nodejs.dispose)
> Symbol.asyncDispose
Symbol(nodejs.asyncDispose)

$ asdf install deno 1.37.0
$ ~/.asdf/installs/deno/1.37.0/bin/deno
Deno 1.37.0
exit using ctrl+d, ctrl+c, or close()
REPL is running with all permissions allowed.
To specify permissions, run `deno repl` with allow flags.
> Symbol.dispose
Symbol(Symbol.dispose)
> Symbol.asyncDispose
Symbol(Symbol.asyncDispose)

In Safari's Web inspector:

> Symbol.dispose
< Symbol(Symbol.dispose)
> Symbol.asyncDispose
< Symbol(Symbol.asyncDispose)

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

• node 18.18.0
• deno 1.37.0 release contains https://github.com/denoland/deno/pull/20506/files#diff-00a8b60a7dc00e07ca154218d7c1f478aedfa44a0b6055e558c1463ca1515dbb
• About Safari, not found

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol

MDN metadata

MDN page report details

• Query: javascript.builtins.Symbol
• Report started: 2025-03-14T12:33:08.651Z

### Tasklist

### Tasks
- [x] Deno
- [x] Node.js
- [ ] Safari

[caugner]

@ikeyan Thank you for these reports. Can you please merge #26217 and #26218 into these ones, so that we have a single issue per feature, even if it covers multiple browsers? 🙏

[ikeyan]

@caugner merged

[skyclouds2001]

for v20.4.0:

for v20.3.0:

---

for v18.18.0:

for v18.17.0:

[skyclouds2001]

for deno v1.37.0

for deno v1.36.0

[caugner]

I tested this JSBin in Safari 18.1, 18.4 and Safari TP 216, and Symbol.{dispose, asyncDispose} do not seem to be supported in any of these versions.

Given that Deno and Node.js data in BCD is updated (thanks @skyclouds2001), we can close this as resolved.