How to use the charAt method in JavaScript

The charAt method is accepted by strings in JavaScript, returning the position of the character passed as a parameter within the string.

If the string contains multiple occurrences of the character passed as a parameter, the charAt method will return only the position of the first occurrence. If the character is not present in the string, the charAt method shall return an empty string.

The charAt method can be used with String objects, although it will also work with standard strings defined with single or double quotes, as well as with literal templates.

In this example we use the charAt method on a standard string, getting first the character at position 0, then the character at position 2 and finally the character at position 20, which is an index that does not exist in the string:

const Zerocharacter = 'JavaScript'.charAt(0) // 'J'  
const Twocharacter = 'JavaScript'.charAt(2) // 'v'  
const Twentycharacter = 'JavaScript'.charAt(20) // ""

The charAt method works in the same way with String objects, as we see in the following example

const chain = new String('JavaScript');  
const character = chain.charAt(0); // 'J'

The charAt method is case sensitive, so the J character is not the same as the j character.

Read also: Strings in JavaScript: What they are and how to use them