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How to Avoid Terrible JavaScript Mistakes?

Most people are aware of programs such as spell check when it comes to correcting mistakes in every-day documents. This nifty invention allows anyone who uses it the ability to fix misspelled words and grammar errors with the click of a button. But what about avoiding terrible mistakes when it comes to more complicated functions such as writing JavaScript? This is where static code analyzers come into play.

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The Top Mistakes That Static Code Analyzers Can Help Avoid

Static code analyzers basically work in the same way spell check does for work documents. You type out a JavaScript, run the analyzer, and if anything is incorrect or undefined in the code vocabulary it will bring it to your attention. The beauty of this gadget is the ability to save yourself hours of looking through code when something does not work the way you imagined.

There are several different types of mistakes that static code analyzers can help you avoid. For instance, JavaScript offers two compare operators to handle differences in either == or === form. While the == compares values of two objects, === compares the object types and values. Fixing these mistakes early on is key to avoiding a long night of re-reading code.

Static code analyzers can also fix mistakes related to undefined variables and late definitions. Common mistypes are a major factor when people encounter bugs with JavaScript. In order to avoid “global scope pollution,” static code analyzers will define variables that need your extra attention or retyping. In addition, reusing a variable can cause redefined functions that assign different properties to already existing variables. Being able to avoid this mistake will save you time dealing with strange results.

Static code analyzer

Using static code analyzers can help you fix errors with curly braces in blocks and loops and conditionals. If you do not understand what a code will do when you write it, you will be stuck with bugs. Static code analyzers will work the fine details of the language to guarantee proper formatting. While JavaScript allows one to define a string with single or double quotes, inconsistency can cause issues for you later when you go to run a program.

Static code analyzers can deal with cyclomatic complexity. The cleaner and simpler a code the better. The more paths your code creates the more confusing it can be, which is why it is always a good idea to have something run through the complexity to avoid any confusion.

Conclusion

If you write code and encounter a bug the last thing you want to do is go back line for line to find the issue. Having a static code analyzer is just a small token when it comes to good functionality. Currently there are three main choices for static code analyzers when it comes to JavaScript web app development: JSLint, JSHint, and Closure Compiler.

Depending on the code you write and what you need to work best for you, choosing the right static code analyzer all depends on what you need. Some people prefer to have more than one running at a time to assure that all mistakes are covered. It is just up to you to decide which is best for your needs.

#JavaScript #StaticCodeAnalyzer #JavaScriptMistakes
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