JavaScript String Transformation: Converting Text to Uppercase

[Nathan D]

I'm working on a JavaScript project where I need to manipulate text strings, and I came across the toUpperCase() method. While I understand its basic functionality of converting text to uppercase, I have a specific use case where I'm encountering unexpected results.

Here's a simplified example of what I'm trying to do:

const text = 'Hello, world!';
const uppercaseText = text.toUpperCase();

console.log(uppercaseText); // Outputs: 'HELLO, WORLD!'

This works perfectly for most text, but when I have special characters or accented letters, the behavior is not what I expected. For example:

const specialText = 'Café au lait';
const uppercaseSpecialText = specialText.toUpperCase();

console.log(uppercaseSpecialText); // Outputs: 'CAFÉ AU LAIT'

The accented 'é' remains unchanged. Is there a way to make the toUpperCase() method handle these special characters and accented letters as well so that the entire text is transformed to uppercase? I looked online on many sites, but I was unable to find the answer. Any tips or code snippets on how to implement this behavior, particularly while working with multilingual content, would be very appreciated. I appreciate your help, and