<ul data-eligibleForWebStory="true"><li>JavaScript is considered weird by many developers, especially beginners, due to its unique features and behaviors.</li><li>ECMAScript Language Specification type-coerces boolean values into their numeric counterparts.</li><li>Comparing floating-point values should be done with tolerance to avoid issues.</li><li>Arrays being truthy leads to interesting outcomes with operators.</li><li>The parseInt function behaves unexpectedly with certain inputs.</li><li>Empty strings are converted to 0 in JavaScript.</li><li>The behavior of null and undefined in JavaScript operations is explained.</li><li>NaN is described as a 'Not-a-Number' value in JavaScript but has some peculiarities.</li><li>JavaScript has some odd issues surrounding NaN, affecting comparisons.</li><li>The isNaN function is recommended for checking if a value is NaN.</li><li>JavaScript's quirks and odd syntaxes may confuse but advancements like TypeScript have helped.</li></ul>

JavaScript in 2025: The Quirks That Keep It Weird

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