In JavaScript, string primitives declared as string literals using single quotes '' and double quotes "" are automatically wrapped in the String object, allowing you to use object-specific properties and methods.

Getting the length of strings

To get the number of characters of a string (its length), you can use its length property:

string.length

Example

Let's consider this script, that filters an array based on the length of its string values:

const fruits = [  'banana',  'apple',  'pineapple',  'raspberry',  'orange',  'lemon'];console.log(fruits.filter(fruit => fruit.length <= 5));

When executed, it will use the filter() method of the fruits array to filter out the strings whose length property is greater than or equal to 5 characters.