tolocaledatestring('fr-fr', month) how to get month, starting from cappital letter in javascript

To get the month name starting from a capital letter, you can simply use a combination of string manipulation functions like substr() and toUpperCase() in JavaScript. Here's an example:

index.tsx
const today = new Date();
const month = today.toLocaleDateString('fr-fr', { month: 'long' });

// Get the first letter of the month and convert it to uppercase
const firstLetter = month.substr(0, 1).toUpperCase();

// Get the rest of the month name and convert it to lowercase
const restOfName = month.substr(1).toLowerCase();

// Join the two parts of the month name together
const formattedMonth = firstLetter + restOfName;

// Use the formatted month string in the toLocaleDateString method
const formattedDate = today.toLocaleDateString('fr-fr', { month: formattedMonth });
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In the above example, we first get the full month name using toLocaleDateString() method with locale 'fr-fr'. Then we get the first letter of month and convert it to uppercase using substr() and toUpperCase() methods. We also get the rest of the month name and convert it to lowercase using substr() method. Finally, we combine both parts of month name together to get formatted month and use it in toLocaleDateString().