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JavaScript Mistakes All Beginners Make (And How To Avoid Them)

JavaScript Mistakes All Beginners Make (And How To Avoid Them)

By July 18, 2015 Blog No Comments
JavaScript Mistakes All Beginners Make (And How To Avoid Them)

Mistakes are a great learning opportunity – and everyone makes makes them, whether you’re an experienced developer with a solid portfolio or a beginner about to start writing your own code for the very first time. However, majority of the JavaScript mistakes can be easily avoided with some foresight and planning. Read on to find out what some of the most common JavaScript mistakes are and how you can avoid them, saving yourself countless hours of coding.

Using Inline JavaScript

Think about it, you wouldn’t combine HTML and CSS, so why would you use inline JavaScript? Creating an external file will not only help you get a much better overview of the JavaScript code itself, but it will also allow you to reuse the same file for different pages without having to copy and paste any of the code. While there are some special occasions where you will want to use inline JavaScript, not creating an external file for the code is considered one of the unnecessary JavaScript mistakes some beginners make.

JavaScript Mistakes All Beginners Make (And How To Avoid Them)Buy Theme Open Demo

Don’t Forget: JavaScript Is Case Sensitive

Even though this may sound obvious, you’d be surprised how many beginners forget that JavaScript is case sensitive. In fact, using a wrong case is one of the most often JavaScript mistakes out there, and even experienced developers make it while rushing to meet a deadline. A variable named avaTheme is different than a variable named AvaTheme. There’s a naming convention most developers follow to avoid JavaScript mistakes like the one we just mentioned: if the name has two or more words, they’re written together, without using spaces, and the first letter of each word is capitalized, except the first one.

Common JavaScript Mistakes When Handling DOM

JavaScript makes it quite easy to manipulate the DOM, whether you want to add, modify, or remove elements. However, what most beginners fail to realize is that the DOM is incredibly slow, which means that multiple DOM modifications can considerably affect the performance of your code. If you’re creating long strings, consider storing each piece of the string as an item within an array element. This is one of the most efficient and simplest ways to build repetitive HTML in JavaScript without using a template library or framework.

JavaScript Mistakes All Beginners Make (And How To Avoid Them)Buy Theme Open Demo

Don’t Confuse Single And Double Quotes

Another obvious one, perhaps, but it’s still worth mentioning. There are many developers out there that actually mismatch quotes and spend hours trying to find the code error. Both single and double quotes work in JavaScript, but the problem arises when you don’t use them consistently. And it’s not just the quotes you should be paying close attention to. Missing or mismatched brackets are another mistake that can be easily avoided. Each and every time you open an element, close it immediately and then write the argument.

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