JavaScript Prototype Chains, Scope Chains, and Performance: What You Need to Know

, Software Pundits
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Toptal

JavaScript is much more nuanced than most developers initially realize. Even for those with more experience, some of JavaScript’s most salient features continue to be misunderstood and lead to confusion. One such feature, described in this article, is the way that property and variable lookups are performed and the resulting performance ramifications to be aware of.

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