tempdate.tolocaledatestring(preferredculture, month) how to get month starting with the capital letter for the french culture in javascript

You can use the toLocaleDateString method provided by the Date object in JavaScript to get the month name in the capital letter for a specific culture.

Here's how you can get the month name with the first letter in uppercase for French culture:

index.tsx
const date = new Date();
const month = date.getMonth();
const options = { month: 'long' };

const frenchMonth = date.toLocaleDateString('fr-FR', options)
  .replace(/^\w/, (c) => c.toUpperCase());

console.log(frenchMonth); // Output: "Novembre"
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In this example, we first get the current month using the getMonth method of the Date object. Then, we define the options object with the month key set to 'long', which returns the full name of the month.

We then call the toLocaleDateString method on the date object and pass the culture code 'fr-FR' and options object to it. This returns the month name in lowercase, which we convert to uppercase using the replace method with a regex.

Finally, we print the result to the console with the first letter in uppercase.