You can use null parameters in many programming languages. Today, we will speak of those who are inserted into Java Script codes. They are those elements which define a variable, without assigning a value to it. Integers and strings use this kind of elements and they create simple variables. But not in a few cases, the null values become real issues when it comes to calculating a variable or manipulating an object, which in another words, it is the same thing.
Let’s say you work with variables in your Java Script code. I can’t imagine other situation than working with variables. You should check the null values, before executing the code, to gain more time. There are some programs which tell you where you did wrong, if you did something wrong in the code. I say this because some of the codes which are written perfectly just don’t work in certain browsers, so you have to make sure how to write the code and where to see it running. You can choose Mozilla, I have seen that it works great and many Web developers who use Java Script recommend this browser.
If you check the null values before running the script, you will limit the errors that could appear. Let’s see how you can do this in a few steps. You don’t have to know programming at a very high level. Still, those who want to learn more, are invited to get a book or to watch some YouTube videos which present step by step how to write a Java Script file. You declare the variable. You say that the variable is X or Y and then write the next Java Script code: var myVal=null;.
You have to check if the variable is null or if it can take this value. You can do this by using the if condition. In some cases, the developer will want to run the code, if the variable is null. If it is not, the code will not be executed. This is not an if else condition. So, you have to write if your variable is null, then the code should execute what you say. The code should be written in { }. Also, evaluate if the variable is not null. There are cases when you might want to run the code if the variable is not null. You can write this code, by saying after the if condition, that your browser has to pay attention to the value of your variable and to run the code only if the variable is not null. So, after if, you should write (!myVal), and then to write the actual code between the { and the }.
You can find more info about how you can check the variables in Java Script, if you access webreference.com. You will find there some very useful Java Script tips. You must have a bit of Java Script knowledge, if you access this site. Good luck!11