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

To get the month starting from a capital letter when using toLocaleDateString() with a specific locale in JavaScript, you can use the following code:

index.tsx
const locale = 'fr-fr';
const date = new Date();
const month = date.toLocaleDateString(locale, { month: 'long' }).replace(/^./, str => str.toUpperCase());

console.log(month); // Output: 'Août' (with a capital letter)
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Explanation:

1. Initialize the locale variable with the desired locale for formatting the date string. In this case, we set it to fr-fr for French (France).
2. Create a new Date object to represent the current date and time.
3. Use the toLocaleDateString() method of the Date object to obtain the full name of the month in the desired locale. We pass the { month: 'long' } option to specify that we want the full month name.
4. Finally, we use the replace() method with a regular expression to replace the first character of the month name with its uppercase counterpart. The str => str.toUpperCase() function is used as the replacement value because it returns the uppercase version of the first character of the string.

With these steps, we get the month with the first letter capitalized, as expected.