This post will discuss some of the possible ways to get the current time in milliseconds since the epoch in JavaScript.

There are several ways to get the current time since the epoch in JavaScript. The epoch is defined as the midnight at the beginning of January 1, 1970, UTC. Here are some possible functions:

1. Using Date.now() function

One way is to use the Date.now() function, which is a built-in static function that returns the number of milliseconds elapsed since the epoch. This function is compatible with strict mode and newer versions of JavaScript. For instance:

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2. Using new Date().getTime() function

Another way is to use the getTime() function of the Date object, which is a built-in object that represents a date and time. We can create a new Date object with the current date and time, and then use the getTime() function to get the number of milliseconds since the epoch. For instance:

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3. Using new Date().valueOf() function

This is another instance function that returns the same value as Date.now(), but uses the valueOf() function that returns the primitive value of a Date object. For instance:

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4. Using unary plus operator

Finally, we can use the unary plus operator (+) on a Date object, which is a shorthand way of converting it to a number. This will return the same result as the getTime() function. We can get the current time using this by creating a new Date object without any arguments and prefixing it with a plus sign. For instance:

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These are some of the ways to get the current time in milliseconds since the epoch in JavaScript. We can use any of them depending on our preference and compatibility.