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doc: add reference for == and != operators #41413

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Jan 8, 2022
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doc: add reference for == and != operators #41413

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doc: add reference for == and != operators
Trott Jan 5, 2022
3605c0d
Update doc/api/assert.md
Trott Jan 5, 2022
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15 changes: 8 additions & 7 deletions doc/api/assert.md
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Expand Up @@ -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()`][]
Expand Down Expand Up @@ -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.
Expand All @@ -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';
Expand Down Expand Up @@ -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
Expand Down Expand Up @@ -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';
Expand Down Expand Up @@ -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
Expand Down