Answers for "how to check is array empty in javascript"

javascript check if array is empty

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

javascript check if array is not empty

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

how to check if array is empty or not in javascript

if(typeof array != 'undefined' && array.length > 0){
	// array has elements
}

check if an array is empty javascript

if (!Array.isArray(array) || !array.length) {
  // array does not exist, is not an array, or is empty
  // ⇒ do not attempt to process array
}