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JavaScript developers commonly make mistakes that can lead to bugs and security issues. Key problems include using innerHTML for text content (creates XSS vulnerabilities), cloning objects with JSON methods (fails with circular references and special values), comparing objects via JSON.stringify (unreliable due to property ordering), using regular objects as maps (prototype pollution risks), and relying on eval() for code execution (security and performance issues). Modern alternatives like textContent, structuredClone, Map objects, and ES6 modules provide safer and more efficient solutions.

Things to avoid in JavaScript

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WebCraft

<p>Best part of Javascript to avoid is all of it.</p>


<p>This is a well-crafted article that provides great examples and rationale; however, it is a bit dated, in my opinion. I am all for learning (or relearning) fundamentals and learning the history behind languages and their use, but many of the concepts (such as using loose vs strict equality operators, use of var, and not using eval()) are either not taught anymore or are a part of JavaScript 101.</p>
