get the date for the first day of the current month in javascript

You can use the built-in Date object in JavaScript to get the current date, and then modify it to get the first day of the current month. Here's an example code snippet:

index.tsx
// Get current date
const today = new Date();

// Set date to first day of the month
const firstDay = new Date(today.getFullYear(), today.getMonth(), 1);

// Format as string (optional)
const dateString = firstDay.toDateString();

// Output result
console.log(dateString);
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This code creates a new Date object with the current date. It then creates a new Date object and sets the year and month to the current year and month, and the day to 1 (which represents the first day of the month). Finally, it formats the resulting Date object as a string using the toDateString() method and outputs the result to the console.