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And more to the point… why do I need to read a whole blog post on it? Two good questions. Well when we’re debugging, stepping removes the guesswork by letting us watch the logic unfold step-by-step. We can pause the code, go through the execution one instruction at a time and isolate the exact point where the bad stuff happens. This is one of the most reliable ways to understand why a bug happens, not just where it shows up. It also shines a microscope on our code flow, showing us.

The JavaScript debugger statement is a built-in keyword that tells the JavaScript engine to pause execution at a specific line of code. When execution stops, you can inspect variables, function scope, and the call stack using developer tools. It is commonly used during development to analyze how values change and where logic breaks, without relying on repeated logging or assumptions. No more guesswork. No more partial truths.

SwiftUI Previews show us how our app will look out in the wild and let us make changes in real time, without emulators. But that’s not the full story. The full benefit of SwiftUI Previews lies in declarativeUI, which allows us to dictate the final state we want to achieve and handles all the process stuff itself. This is a game-changer for developers, allowing us to shift our focus from ‘how’ to ‘what’.

Whether you’re building your first iOS app or improving user engagement, understanding push notifications is essential. They’re how apps stay connected with users, delivering updates, reminders and alerts even when the app itself isn’t running. In this guide, you’ll learn how to implement iOS push notifications from setup to debugging, using Swift and Apple Push Notification Service (APNs) in a real app.

Exceptions are inevitable. It’s how we deal with them that matters. An effective exception handling regime is the difference between an app that only works in sandbox and one that can adapt and scale in the real world. JavaScript can throw up all kinds of weird and wonderful exceptions, because it runs in inherently unpredictable environments. So we’ve put together this guide to give you a clear, repeatable plan for handling them.

An effective JavaScript debugging regime is essential if we want to build responsive, reliable and highly-rateable Android apps. JavaScript doesn’t enforce types at compile time (unlike Swift) and this means errors often happen quietly, when users are already feeling them. So it’s vital that we debug pre-emptively, using knowledge rather than guesswork.

Kotlin annotations allow compilers or libraries to understand our code. These metadata tags don’t directly change code logic, but they help modify how it is interpreted, optimized, or validated. This simplifies Android development by automating repetitive tasks and ensuring consistent code behavior. It also improves code readability, reduces boilerplate code, and introduces automated checks and generation.

Remote debugging is the most reliable way to grasp what’s really happening inside a mobile app once it’s out in the wild. We’re talking crashes that never appear in development, and issues from users that can’t be reproduced locally. If you ship mobile apps, you’ve been vexed by these problems at some point.

Chrome developer tools, or Chrome DevTools, give us a window on how our websites working in the wild. Built for developers of all experience grades, they provide powerful ways to inspect, debug and optimize our projects. However the sheer breadth of functionality can be a mind-melt if you’ve not worked with DevTools before, and there are lots of advanced features that even experienced users find tricky.

iOS code signing is a critical step in app development, ensuring apps are secure and trusted by Apple and users. However, it often leads to frustrating errors that can disrupt development and delay app launches. Here’s what you need to know.