Converting Unix Timestamps to yyyy-mm-dd Format in JavaScript:

 To convert a Unix timestamp to the format yyyy-mm-dd using JavaScript, you can use the Date object along with some additional methods to extract the year, month, and day. Here's an example function that performs the conversion:

function convertUnixTimestamp(timestamp) {
  const date = new Date(timestamp * 1000); // Convert timestamp to milliseconds
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0'); // Month is zero-based
  const day = String(date.getDate()).padStart(2, '0');

  return `${year}-${month}-${day}`;
}

In this function, we create a new Date object by multiplying the Unix timestamp by 1000 to convert it from seconds to milliseconds. Then, we use the getFullYear(), getMonth(), and getDate() methods of the Date object to extract the year, month, and day components.

Since the getMonth() method returns a zero-based index (0 for January, 1 for February, etc.), we add 1 to the result and use String() and padStart() methods to ensure that the month and day are always two digits.

Finally, we return the formatted string in the yyyy-mm-dd format.

Here's an example usage of the function:

const unixTimestamp = 1621848620; // Replace with your Unix timestamp
const formattedDate = convertUnixTimestamp(unixTimestamp);
console.log(formattedDate); // Output: 2021-05-24

Make sure to replace 1621848620 with your actual Unix timestamp in seconds. The formattedDate variable will contain the converted date in the yyyy-mm-dd format.