how to check if an array is empty or not in 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 check if array is empty

if (array && !array.length) {
    // array is defined but has no element
}

Example 3: js how to check is array empty es6

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

Example 4: js check if array is empty

if (typeof image_array !== 'undefined' && image_array.length > 0) {
    // the array is defined and has at least one element
}