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5 Input Validation Rules Every Developer Should Follow
Because one unchecked input can destroy your database, crash your app, or leak your users’ data. Introduction: The Most Boring Topic That Breaks the Most Apps Every time a breach happens, developers imagine hackers using complex exploits or zero-days.In reality, most attacks don’t start that way.They start with bad input handling. A missing check.A poorly validated field.An…
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If You Don’t Sanitize Inputs, You’re Practically Inviting Hackers In
The simplest mistakes that expose your app and how to stop them before they happen. Introduction: The Most Common Mistake in Web Development Every modern app takes input from users, APIs, forms, query parameters, or files.But here’s the uncomfortable truth:Most security breaches don’t start with some elite hacker. They start with a developer who forgot to…
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I Broke My Own App to Finally Understand How Input Sanitization Works
Sometimes the best way to learn security isn’t by reading about it, it’s by watching your own code break. Introduction: The Day I “Hacked” Myself I’ve been building web apps for years clean UI, structured APIs, and modern frameworks.I thought I understood security pretty well. Then one day, a QA tester sent me a message: “Hey, why…
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Most Developers Still Confuse LocalStorage with SessionStorage
They look similar, but they behave completely differently, and knowing the difference can save you from serious data bugs. Introduction It’s one of those things every frontend dev thinks they understand… localStorage.setItem(“token”, “abc123”);sessionStorage.setItem(“token”, “abc123”); Both store data in the browser, both look persistent, and both use the same API. So what’s the big deal, right? The…
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Storing Complex Objects in localStorage
A practical, senior-dev guide to serializing complex data (Dates, Maps/Sets, BigInt, circular refs), compression, versioning/migrations, quotas, and rock-solid utilities for the real world. Introduction localStorage is deceptively simple: localStorage.setItem(“user”, JSON.stringify({ id: 1 })); …and you’re done, right? Not quite. Real apps need to persist complex objects: Dates, Maps/Sets, BigInts, nested graphs, and sometimes circular references. You’ll…
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