There are various methods to check whether an array in JS is empty or not. Before that, we will see what an array is then move forward to the methods with which you can check if the array is empty or not. Hire JS developers directly from vteams, forget the worries of finding the right fit.
Why you want to check if array is empty
How to check if an array is empty in JS
Check the length
For instance, the code
arrayOne.length ? true : false
It would return false if the length is 0 and true if it is not. On the other hand it will also tell you if the array is defined or not. Meaning, if it has garbage value or actually null. In that condition, it will return null instead.
&& with length operator
To avoid the error that we previously had with you can use && operator with the length operator. The code will look something like this
arrayOne && arrayOne.length ? true : false
However, this method is not recommended and not very efficient. There are better ways to check the length and check if the array is empty or not.
Instead of the && operator with the length operator there is a simpler way to check the array. With the “?” operator. The code looks like this:
arrayOne?.length ? true : false
If what is on the left side of the operator is true we get its value. But if that is not true we get what is on the right side of operator
Relevant Post: https://theus-times.com/what-is-core-php-development-services-for-web-applications/