In JavaScript, strings and numbers have properties that provide useful information about them.

String properties

Strings in JavaScript have one basic property, length

Returns the number of characters in a string

This property is read-only (it cannot be changed)

const str = "Hello, Elle!";
console.log(str.length); 

The syntax of the properties of strings and numbers, unlike the methods, is written without parentheses at the end.

Properties of numbers

Numbers have static properties such as MAX_VALUE, MIN_VALUE, Non, POSITIVE_INFINITY, NEGATIVE_INFINITY, EPSILON, MAX_SAFE_INTEGER and MIN_SAFE_INTEGER that provide information about numeric constants and constraints.