check if element 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: js check if div is empty

if ($('#element').is(':empty')){
  //do something
}

Example 3: javascript check if object is null or empty

if (typeof value !== 'undefined' && value) {
    //deal with value'
};