![]() In JavaScript we have the debugger statement, if you never heard about it, basically stops the execution in the same way if you put a breakpoint in Chrome Dev Tools.īecause we have an statement, it’s pretty easy to start debugging with conditionals.īut why I should use conditional debugging with JavaScript? There are a lot of reasons, but one of my favorite is to avoid entering in a function like 100 times waiting for that object that it’s breaking your app. If (nextConsoleObj.Conditional debugging with JavaScript is not very common, in fact, there’s no support at all for most of languages. ![]() eslint-disable-next-line no-prototype-builtins Example 1Įxport const createDebugConsole = (consoleObj, options = ) Example 1 shows the function that does this. We can do this by replacing the browser's 'nsole' object with a modified version of the same. That certainly isn't a good strategy given that we all make mistakes from time to time.Ī better solution would be to integrate the debug or environment condition into the console itself. It's also easy to forget so your users' security will depend on your memory. You could also wrap your ' console' method calls in a condition that checks a debug or environment flag and only executes the calls in development, but that's a bit awkward. If we have a valid name, which is a string and not a falsy value, it will be returned and put in username. You can use 'eslint-disable' comments to bypass the linter, but you still run the risk of leaking sensitive information if you forget to clean up before you deploy. Since in JavaScript we can use non-boolean values in our conditionals which are then coerced to true or false, if we use a truthy value in our condition, it returns that truthy value and not the value true. The problem is that there are times when you want to leave 'console' method calls in place. We've found that many small bugs can be avoided by making linting mandatory before committing code.) ![]() (On RedBit's web team, we use husky to run the linter on a pre-commit hook so that ' console' method calls are never committed by accident. That's why many developers use a linter to warn about console method calls and other issues. The JavaScript console is a very useful debugging tool, but it can also introduce a very simple security risk into your application: 'console' method calls that aren't removed before code is deployed can leak sensitive information to the browser. ![]()
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