Check the callstack and see what functions are called and their order.Step through the code by resuming execution, one line at a time, or hop on to the next function call.From there you can deep dive into your code using the different options at hand: And you can set many of them at the same time. The execution comes to a halt as soon as it reaches the breakpoint. The Console serves two objectives at least: display of your application’s logs plus runtime errors and ability to execute custom JS code. Let’s hit F12 and get familiar with the different panels. The good old “inspector” will boost your productivity when it comes to debugging JavaScript, tweaking DOM and CSS, inspecting network activity, analyzing performance, tracking down memory leaks and much more. It makes it easy to inspect and edit the props/state of the root React components rendered on the page and record performance information.īut the best debugging tools are already bundled with your browser. One of the popular extension out there is definitely the React Developer Tools available on both Firefox and Chrome. (Most of the learnings here are applicable to all frontend applications) React debugging tools In this article, we’ll be covering some of the tactics and tools ReactJS programmers use on a daily basis, not only in their very predictable development environment, but also in production when their code comes to life and things may - and will - go haywire. Besides, what better way of deeply understanding a language or framework if not by looking at its inner workings. Knowing how to effectively debug an application is of the utmost importance to frontend developers as they’ll be spending a good portion of their time reproducing and fixing issues.
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