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doc: add reference for == and != operators

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Refs: https://github.com/nodejs/node/pull/41375#issuecomment-1003763712

PR-URL: https://github.com/nodejs/node/pull/41413
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
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Rich Trott authored and GitHub committed 2022-01-08 04:00:55 +00:00
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@@ -104,7 +104,7 @@ more on color support in terminal environments, read the tty
## Legacy assertion mode
Legacy assertion mode uses the `==` operator in:
Legacy assertion mode uses the [`==` operator][] in:
* [`assert.deepEqual()`][]
* [`assert.equal()`][]
@@ -524,7 +524,7 @@ are also recursively evaluated by the following rules.
### Comparison details
* Primitive values are compared with the `==` operator,
* Primitive values are compared with the [`==` operator][],
with the exception of `NaN`. It is treated as being identical in case
both sides are `NaN`.
* [Type tags][Object.prototype.toString()] of objects should be the same.
@@ -544,7 +544,7 @@ are also recursively evaluated by the following rules.
are not enumerable properties.
The following example does not throw an [`AssertionError`][] because the
primitives are compared using the `==` operator.
primitives are compared using the [`==` operator][].
```mjs
import assert from 'assert';
@@ -1166,7 +1166,7 @@ An alias of [`assert.strictEqual()`][].
> Stability: 3 - Legacy: Use [`assert.strictEqual()`][] instead.
Tests shallow, coercive equality between the `actual` and `expected` parameters
using the `==` operator. `NaN` is specially handled
using the [`==` operator][]. `NaN` is specially handled
and treated as being identical if both sides are `NaN`.
```mjs
@@ -1684,9 +1684,8 @@ An alias of [`assert.notStrictEqual()`][].
> Stability: 3 - Legacy: Use [`assert.notStrictEqual()`][] instead.
Tests shallow, coercive inequality with the
`!=` operator. `NaN` is specially handled and treated as being identical if
sides are `NaN`.
Tests shallow, coercive inequality with the [`!=` operator][]. `NaN` is
specially handled and treated as being identical if both sides are `NaN`.
```mjs
import assert from 'assert';
@@ -2449,6 +2448,8 @@ argument.
[Object.prototype.toString()]: https://tc39.github.io/ecma262/#sec-object.prototype.tostring
[SameValue Comparison]: https://tc39.github.io/ecma262/#sec-samevalue
[Strict Equality Comparison]: https://tc39.github.io/ecma262/#sec-strict-equality-comparison
[`!=` operator]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Inequality
[`==` operator]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality
[`AssertionError`]: #class-assertassertionerror
[`CallTracker`]: #class-assertcalltracker
[`Class`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes