check if an array is empty or null or undefined in javascript 3f

1if (typeof array !== 'undefined' && array.length === 0) {
2    // the array is defined and has no elements
3}
4

1// To safely test if the array referenced by variable “array” isn’t empty:
2
3if (array && array.length) {    
4   // not empty  
5} else { 
6   // empty 
7} 
8// Note that if “array” is assigned to some other object that isn’t an array, the code will still execute the “else” part.
9
10// A possible improvement to check that the object is specifically an empty array might be this:
11
12if (array && array.constructor === Array && array.length === 0) {    
13   // strictly an empty array 
14} else { 
15   // either null, or not an array or not an empty array 
16} 

1let myArray = [];
2
3if( myArray.length  > 0  ) {
4    console.log(myArray);
5    console.log("Array has elements");
6}
7else {
8    console.log("Array has no elements");
9}