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JavaScript method parse() based on the date and time according to the number of milliseconds between 1970/1/1 midnight (GMT time)

黄舟
黄舟Original
2017-11-07 10:03:432318browse

Definition and Usage

The parse() method parses a date and time string and returns the number of milliseconds from midnight on January 1, 1970 to the date and time.

Syntax

Date.parse(datestring)
Parameters Description
datestring Required. A string representing the date and time.

Return value

The number of milliseconds between the specified date and time as of midnight (GMT time) on January 1, 1970.

Description

This method is a static method of the Date object. This method is generally called in the form of Date.parse() instead of dateobject.parse().

Tips and Notes:

Note: Date.parse() is a static method of the Date object.

Example

Example 1

In this example, we will get the number of milliseconds from 1970/01/01 to 2005/07/08: 

<script type="text/javascript">

var d = Date.parse("Jul 8, 2005")
document.write(d)

</script>

Output: 

1120752000000

Example 2

Now, we will convert the output of the above example into adults: 

<script type="text/javascript">

var minutes = 1000 * 60
var hours = minutes * 60
var days = hours * 24
var years = days * 365
var t = Date.parse("Jul 8, 2005")
var y = t/years
document.write("It&#39;s been: " + y + " years from 1970/01/01")
document.write(" to 2005/07/08!")

</script>

Output: 

It&#39;s been: 35.538812785388124 years from 1970/01/01 to 2005/07/08!

The following are the details of the parameters: 

datestring : 一个字符串，表示日期

Return value:

The number of milliseconds since midnight on January 1, 1970.
Example:

<html>
<head>
<title>JavaScript parse Method</title>
</head>
<body>
<script type="text/javascript">
  var msecs = Date.parse("Jul 8, 2008");
  document.write( "Number of milliseconds from 1970: " + msecs ); 
</script>
</body>
</html>

This will produce the following results:

Number of milliseconds from 1970: 1215455400000

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