util: move util.isSymbol to eol

PR-URL: #52744 Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Ulises Gascón <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: Moshe Atlow <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · May 6, 2024 · 05e72c9 · 05e72c9
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diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
@@ -1304,6 +1304,9 @@ The `util.isString()` API has been removed. Please use
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/52744
+    description: End-of-Life deprecation.
   - version: v22.0.0
     pr-url: https://github.com/nodejs/node/pull/50488
     description: Runtime deprecation.
@@ -1319,9 +1322,9 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
-The [`util.isSymbol()`][] API is deprecated. Please use
+The `util.isSymbol()` API has been removed. Please use
 `typeof arg === 'symbol'` instead.
 
 ### DEP0058: `util.isUndefined()`
@@ -3799,7 +3802,6 @@ is deprecated to better align with recommendations per [NIST SP 800-38D][].
 [`util.isObject()`]: util.md#utilisobjectobject
 [`util.isPrimitive()`]: util.md#utilisprimitiveobject
 [`util.isRegExp()`]: util.md#utilisregexpobject
-[`util.isSymbol()`]: util.md#utilissymbolobject
 [`util.isUndefined()`]: util.md#utilisundefinedobject
 [`util.log()`]: util.md#utillogstring
 [`util.promisify`]: util.md#utilpromisifyoriginal

diff --git a/doc/api/util.md b/doc/api/util.md
@@ -3140,31 +3140,6 @@ util.isRegExp({});
 // Returns: false
 ```
 
-### `util.isSymbol(object)`
-
-<!-- YAML
-added: v0.11.5
-deprecated: v4.0.0
--->
-
-> Stability: 0 - Deprecated: Use `typeof value === 'symbol'` instead.
-
-* `object` {any}
-* Returns: {boolean}
-
-Returns `true` if the given `object` is a `Symbol`. Otherwise, returns `false`.
-
-```js
-const util = require('node:util');
-
-util.isSymbol(5);
-// Returns: false
-util.isSymbol('foo');
-// Returns: false
-util.isSymbol(Symbol('foo'));
-// Returns: true
-```
-
 ### `util.isUndefined(object)`
 
 <!-- YAML

diff --git a/lib/util.js b/lib/util.js
@@ -90,15 +90,6 @@ function lazyAbortController() {
 
 let internalDeepEqual;
 
-/**
- * @deprecated since v4.0.0
- * @param {any} arg
- * @returns {arg is symbol}
- */
-function isSymbol(arg) {
-  return typeof arg === 'symbol';
-}
-
 /**
  * @deprecated since v4.0.0
  * @param {any} arg
@@ -381,9 +372,6 @@ module.exports = {
     }
     return internalDeepEqual(a, b);
   },
-  isSymbol: deprecate(isSymbol,
-                      'The `util.isSymbol` API is deprecated.  Please use `arg === "symbol"` instead.',
-                      'DEP0057'),
   isUndefined: deprecate(isUndefined,
                          'The `util.isUndefined` API is deprecated. Please use `arg === undefined` instead.',
                          'DEP0058'),

diff --git a/test/parallel/test-util.js b/test/parallel/test-util.js
@@ -103,10 +103,6 @@ assert.strictEqual(util.isUndefined(), true);
 assert.strictEqual(util.isUndefined(null), false);
 assert.strictEqual(util.isUndefined('string'), false);
 
-assert.strictEqual(util.isSymbol(Symbol()), true);
-assert.strictEqual(util.isSymbol(), false);
-assert.strictEqual(util.isSymbol('string'), false);
-
 assert.strictEqual(util.isFunction(() => {}), true);
 assert.strictEqual(util.isFunction(function() {}), true);
 assert.strictEqual(util.isFunction(), false);