Unix timestamp from date

Gets the Unix timestamp from a Date object.

Use Date.prototype.getTime() to get the timestamp in milliseconds and divide by 1000 to get the timestamp in seconds.

Use Math.floor() to appropriately round the resulting timestamp to an integer.

Omit the argument, date, to use the current date.

const getTimestamp = (date = new Date()) => Math.floor(date.getTime() / 1000);

// EXAMPLE
getTimestamp(); // 1602162242

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