Few common React Js Application Support Issues.
Tags: react
Published: 2020-01-10 13:23:41

<I>As RectJs developer, I supported many ReactJs applications.
In this post, I summarized a few points which I learned during support task.</I>
<b>I will keep updating this post in the future also if I find new things in this context.<b>

<img src="https://thepracticaldev.s3.amazonaws.com/i/zh1jcn4n3fowlm6e6mee.jpg"  width="600px">

1. The <a href="https://reactjs.org/docs/react-component.html" alt="react js components" rel="nofollow">react js components</a> start with the capital letter, and if you start the component with the lower case, then it treated as a built-in element of the program or treated as spam. An error warning popped up that element is not recognized. <b>You need to be a little careful while naming the components</b>.

2. While reading online or referring to a tutorial, we come across many components and elements, and you need to follow the exact instructions mentioned in the tutorial. 
While learning from the tutorial,<b> I recommend, you should know about the version used in learning and try to use up-dated version to avoid <a href="https://en.wikipedia.org/wiki/Framework" alt="framework" rel="nofollow">framework</a> bugs </b>.

3.  In another support issue I observed, The strings created with backticks are different than the strings created with the single quotes.The strings that enclosed within the backticks include logical expressions.  The strings created using single quotes contain the regular strings. This type of small things makes your <a href="https://www.kishoreclasses.com/ReactJs-Job-Support-from-India.html" alt="React Js Support">react js support</a> process easy.

4. Another thing you should know is that the number should not pass as strings. The numbers should pass within a curly bracket. If you use curly brackets to pass on the numerical value, then it is quite easy to perform the mathematical operations using that number.

5. After developing your application, you need a server and a port to send the request to the <a href="https://www.webopedia.com/TERM/H/HTTP.html" alt="HTTP" rel="nofollow">HTTP</a>  address. If you assign a particular port number and a host value, you cannot use the same one for anything else, so you should make a note of this while using the hosts and ports. <b>If you use the same host and port, an error message popped up, stating that the server is already in use </b>.

6. Before running or the final execution, you need to set an environment variable for the successful execution of the code if you do not set an environment variable, the project uses an undefined variable that can give you some errors.

7. While supporting your project you should understand the game of brackets. It would be best if you did not confuse the curly brackets and the parenthesis. This understanding can create significant differences.  You can look at the several compilation failures in the tutorials where the change in brackets can cause blunders. Well, during execution, you will get a pop up for the same.

8. It is essential to understand the open tag and a close tag. You should not mix up </tag> and <tag/>. Some tags do not need to be ended with a close tag or opened with the open tag, and these are known as a void tag. The < img/> is one of the self- closing tags.

For a user, the user interface matters a lot, so whether you are creating a single web page or a mobile application, the interface should be user-friendly. The user interfaces created the help of the ReactJs efficiently. 
The react is a JavaScript library that is mainly known for building user interfaces. 
The react is used by the top enterprises and mobile app developers to create an excellent interface.

The react update and render the information on your web page once the data changes. Due to the declarative approach that you can view 
the correct update for the correct state of your application.
Let us assume an example for Facebook, suppose you have uploaded a picture, and it has got 10 like and 5 comments. After a few moments later, you see there are 200 likes and 50 comments even without reloading the content of the page or refreshing the site, and all of this is magic possible with react js.

The react JavaScript libraries are open source front end libraries that are responsible for the view layer in the mobile application. 
In terms of the programming language, it is the ‘V’ in the MVC model of the programming. The react libraries are quite flexible and effective. 
It uses a declarative concept of computer programming that mainly showcases the business logic of the developer than the programming logic.