check for empty array in javascript code example

Example 1: javascript check if array is empty

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

Example 2: javascript empty array

arr = [];   // set array=[]

//function
const empty = arr => arr.length = 0;
//example
var arr= [1,2,3,4,5];
empty(arr) // arr=[]

Example 3: 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
}