You can use the typeof operator to check if a value was undefined.
if (typeof name === "undefined") {
// code here
}
The typeof operator returns a string indicating the type of the unevaluated operand.
You can use the typeof operator to check if a value was undefined.
if (typeof name === "undefined") {
// code here
}
The typeof operator returns a string indicating the type of the unevaluated operand.
