Common Errors Face by JavaScript Programmers & How You Can Avoid Them
Assignment Help
21st Dec 2021
A client-side scripting language which is widely used by the programmers to make web applications. Yes! You guessed it right. It is a JavaScript programming language. It does some task which is not in hand of server-side scripting just like in-browser interactivity. For example, if an end user clicks on a specific button, suddenly a pop up appears. It’s processing is much faster and put less stress on the JavaScript that runs in the browser. But still, there are some who often commit JavaScript Programming Mistakes. To avoid any kind of error, read this blog. Here we will learn some effective tips that help to resolve JavaScript programming mistakes. Moreover, you can also hire JavaScript Programming assignment help.
Some Pitfalls That Often Found Seen by Front-End Developers While Writing JavaScript Code
Using ‘IF’ Statement Comparison Operator Inaccurately
Even experienced developers make the silly mistake which creates a major bug in the coding. Here, we are talking about ‘=’and ‘==’ operator. The former operator is used for assigning value and the later one is used for comparison. This error generally created due to the language they use. Some languages throw some types of error, but in the JavaScript, it is how statement evaluated.
var x=5;
If (x==5)
This above statement will generate the same result you are expecting. It will evaluate the value of x, equal to 5. But still, in some case, developers make typo error such as:
var x=0;
if (x=5)
Now, if you have typed ‘if’ statement, then there has a typo error. Despite using the comparison operator, the programmer has accidentally chosen the assignment operator which will show an error. If you will not carefully select the operator, then you will get the wrong answer which you are actually expecting. Hence, it is good if you are making use of the right operator. To better know the concepts, you can hire programming assignment writing.
Always Keep in Mind That a Symbol of ‘+’ is Used for Addition and Concatenation
No each language used the plus symbol for string concatenation or addition, but yes JavaScript does. So, it is good if you are careful while using plus sign in writing the statements for your program. Have a look at the following code lines:
var x= 10 + 5;
Now, in the above code, the value of x is expected to get 15. But while using JavaScript use mix of numbers and strings because of the user input. Have a look at the following lines:
var x = 10+ “5”;
But this statement evaluates answer as 105, it is because you are using as 5 as a string and the plus sign between two digits acts as a concatenation symbol. This will fetch this statement as 105. To avoid this kind of problem, just convert the string into an integer:
var x= 10 + parseInt (“5”, 10);
With this statement, string value will be parsed to the integer value 5, and here the symbol used as an addition rather than concatenation.
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