Length
It's easy in Javascript to know how many characters are in a string using the property .length. The length property returns the number of characters in the string, including spaces and special characters.
let size = "Our lovely string".length;
console.log(size);
// size: 17
let emptyStringSize = "".length
console.log(emptyStringSize);
// emptyStringSize: 0
The length property of an empty string is 0.
The length property is a read-only property, so you cannot assign a new value to it.