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pratap
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Asked: 2021-07-05T19:01:16+00:00 In:

How do you get a timestamp in JavaScript?

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How do you get a timestamp in JavaScript?

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    2 Answers

    1. This answer was edited.

      The following example demonstrates how to get a timestamp and how to convert it back to the human-readable date and time format.

      <script type="text/javascript"><br />$("#elementId :selected").text(); // The text content of the selected option<br />$("#elementId :selected").val(); // The value of the selected option<br /></script>
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    2. This answer was edited.

      How do you get a timestamp in JavaScript?

      Timestamp in milliseconds

      To get the number of milliseconds since Unix epoch, call Date.now:

      Date.now()

      Alternatively, use the unary operator + to call Date.prototype.valueOf:

      + new Date()

      Alternatively, call valueOf directly:

      new Date().valueOf()

      To support IE8 and earlier (see compatibility table), create a shim for Date.now:

      if (!Date.now) {
    Date.now = function() { return new Date().getTime(); }
}

      Alternatively, call getTime directly:

      new Date().getTime()

      Timestamp in seconds

      To get the number of seconds since Unix epoch, i.e. Unix timestamp:

      Math.floor(Date.now() / 1000)

      Alternatively, using bitwise-or to floor is slightly faster, but also less readable and may break in the future (see explanations 1, 2):

      Date.now() / 1000 | 0
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