In JavaScript, the **`codePointAt()` method** is used to get a positive integer, which is the UTF-$16$ code point value.

#    
#  Syntax

The syntax of the `codePointAt()` method is as follows:

```js
codePointAt(position)
```
#   
#  Parameters
The **`position` parameter** specifies the position of the element inside the provided string for which we want the code point value.

##  
## Return value

If it finds the element at the specified `position`, the function returns an integer that represents the code point value.

> Note: If the element is a UTF-16 high surrogate (higher than `U+FFFF`), the function returns the surrogate pair. Otherwise, it returns the lowest surrogate point. 

If it doesn't find the element, the function will return `undefined`.

##  
## Code

The code below shows how the `codePointAt()` method works:

console.log("Hello, Educative".codePointAt(10));

// since we are working with utf16 multibyte characters are valid too
console.log("😀".codePointAt(0));
console.log("😀".codePointAt(1));

// this is out of range
console.log("Hello, Educative 😀".codePointAt(100));

#   
## Explanation

In line $1$, the value of the `position` parameter is $10$, which corresponds to the character `c` in the string `"Hello, Educative"`. Consequently, the `codePointAt()` method returns the corresponding code point value. Similarly, the code point value for the strings in lines $4$ and $5$ are printed.

The `codepointAt()` method in line $8$ returns `undefined`, as the `position` parameter is larger than the length of the string.

What is codePointAt() in JavaScript?

The codePointAt() method in JavaScript returns the UTF-16 code point value of a character at a specified string position.