JavaScript check if an array is valid

up:: JavaScript 🔖 javascript - How to check if array is empty or does not exist? - Stack Overflow

The foolproof way

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

The short way

if (array?.length) {
    // array and array.length are truthy
    // ⇒ probably OK to process array
}