how to tell if an array is empty javascript code example

Example 1: javascript check if array is empty

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

Example 2: javascript is array empty

var colors=[];
if(!colors.length){
	// I am empty
}else{
	// I am not empty
}

Example 3: javascript cehck if array is empty

if (array === undefined || array.length == 0) {
    // array empty or does not exist
}