clarify wording about null and undefined equality in JS #3902
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Pull Request Overview
This PR updates the JavaScript comparison documentation to clarify that null and undefined are equal to themselves (self-equality) and to each other when using loose equality (==), addressing potential ambiguity in the previous wording.
- Adds explicit mention of self-equality for
nullandundefinedvalues - Clarifies that these values are equal to themselves and each other under loose equality
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Updated the explanation of JavaScript’s loose equality to accurately state that null and undefined are equal to themselves and to each other (==), but not equal to any other value. The previous wording was ambiguous about whether “each other” included self-equality.