Date Example – Data Type – JavaScript Syntax – JS Date Example
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Date Example – Data Type – JavaScript Syntax – JS Date Example
Purpose: – Illustrates the JavaScript syntax for the Date example.
Prerequistes:
- Install Visual Web Developer 2008
Syntax: var myCurrentDate = new Date(); – Demonstrates creating a Date object and various ways to instantiate, manipulate, and retrieve.
Restrictions: None
Notes:
- You can build your own library of syntax examples by using same web site over and over and just add new files to it.
Instructions:
- Use Visual Web Developer 2008
- Create new web site;
- Click File/New Web Site
- Select ASP.NET Website Template
- Select C-Sharp for Language
- name of Web Site could be JavaScript_Syntax.
- Add New folder named "DataType"
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: DataType
- Add HTML Page Named Date to DataType folder
- Right-click DataType folder;
- add new item;
- Select HTML Page
- HTML Page name could be Date
- Click on copy code in code below to copy code into HTML Page Date.htm
- Right-click on HTML page Date and select view in browser
| HTML | | copy code | | ? |
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
<html> |
<head> |
<title>Boolean</title> |
<script type="text/javascript" > |
//***************************************************** |
// Four ways instantiate a Date object |
//***************************************************** |
// Note: Most of the parameters are optional and if you |
// omit them, a 0 is returned in its place. Months start |
// with Jan = 0; Feb = 1; etc |
//***************************************************** |
//1. new Date() // current date and time |
var myCurrentDate = new Date(); // current date and time |
document.write("myCurrentDate = " + myCurrentDate); |
document.write("<br />"); |
//2. new Date(milliseconds) //milliseconds since 1970/01/01 |
var myMillisecondsDate = new Date(50000000); //milliseconds since 1970/01/01 |
document.write("myMillisecondsDate = " + myMillisecondsDate); |
document.write("<br />"); |
//3. new Date(dateString) |
var myDateString = new Date("Jan 1, 2010"); |
document.write("myDateString = " + myDateString); |
document.write("<br />"); |
//4. new Date(year, month, day, hours, minutes, seconds, milliseconds) |
var myDateParts = new Date(2010, 1, 15, 13, 59, 48, 37); |
document.write("myDateParts = " + myDateParts); |
document.write("<br />"); |
//***************************************************** |
// SetDate method allows you to set a date or add or subtract to a date |
//***************************************************** |
var mySetDate = new Date(); |
mySetDate.setFullYear(2010, 0, 14); |
document.write("mySetDate = " + mySetDate); |
document.write("<br />"); |
var myGetDate10 = new Date(); |
myGetDate10.setDate(myGetDate10.getDate() + 10); |
document.write("myGetDate10 = " + myGetDate10); |
document.write("<br />"); |
//***************************************************** |
// How to format the date to locale area |
//***************************************************** |
var myDate = new Date(); |
document.write(myDate.toLocaleDateString()); |
document.write("<br />"); |
//***************************************************** |
// Date Object Methods |
//***************************************************** |
//Method Description |
//getDate() Returns the day of the month (from 1-31) |
//getDay() Returns the day of the week (from 0-6) |
//getFullYear() Returns the year (four digits) |
//getHours() Returns the hour (from 0-23) |
//getMilliseconds() Returns the milliseconds (from 0-999) |
//getMinutes() Returns the minutes (from 0-59) |
//getMonth() Returns the month (from 0-11) |
//getSeconds() Returns the seconds (from 0-59) |
//getTime() Returns the number of milliseconds since midnight Jan 1, 1970 |
//getTimezoneOffset() Returns the time difference between GMT and local time, in minutes |
//getUTCDate() Returns the day of the month, according to universal time (from 1-31) |
//getUTCDay() Returns the day of the week, according to universal time (from 0-6) |
//getUTCFullYear() Returns the year, according to universal time (four digits) |
//getUTCHours() Returns the hour, according to universal time (from 0-23) |
//getUTCMilliseconds() Returns the milliseconds, according to universal time (from 0-999) |
//getUTCMinutes() Returns the minutes, according to universal time (from 0-59) |
//getUTCMonth() Returns the month, according to universal time (from 0-11) |
//getUTCSeconds() Returns the seconds, according to universal time (from 0-59) |
//getYear() Deprecated. Use the getFullYear() method instead |
//parse() Parses a date string and returns the number of milliseconds since midnight of January 1, 1970 |
//setDate() Sets the day of the month (from 1-31) |
//setFullYear() Sets the year (four digits) |
//setHours() Sets the hour (from 0-23) |
//setMilliseconds() Sets the milliseconds (from 0-999) |
//setMinutes() Set the minutes (from 0-59) |
//setMonth() Sets the month (from 0-11) |
//setSeconds() Sets the seconds (from 0-59) |
//setTime() Sets a date and time by adding or subtracting a specified number of milliseconds to/from midnight January 1, 1970 |
//setUTCDate() Sets the day of the month, according to universal time (from 1-31) |
//setUTCFullYear() Sets the year, according to universal time (four digits) |
//setUTCHours() Sets the hour, according to universal time (from 0-23) |
//setUTCMilliseconds() Sets the milliseconds, according to universal time (from 0-999) |
//setUTCMinutes() Set the minutes, according to universal time (from 0-59) |
//setUTCMonth() Sets the month, according to universal time (from 0-11) |
//setUTCSeconds() Set the seconds, according to universal time (from 0-59) |
//setYear() Deprecated. Use the setFullYear() method instead |
//toDateString() Converts the date portion of a Date object into a readable string |
//toGMTString() Deprecated. Use the toUTCString() method instead |
//toLocaleDateString() Returns the date portion of a Date object as a string, using locale conventions |
//toLocaleTimeString() Returns the time portion of a Date object as a string, using locale conventions |
//toLocaleString() Converts a Date object to a string, using locale conventions |
//toString() Converts a Date object to a string |
//toTimeString() Converts the time portion of a Date object to a string |
//toUTCString() Converts a Date object to a string, according to universal time |
//UTC() Returns the number of milliseconds in a date string since midnight of January 1, 1970, according to universal time |
//valueOf() Returns the primitive value of a Date object |
//***************************************************** |
// How to Compare a date |
//***************************************************** |
var myDate = new Date(); |
myDate.setFullYear(2010, 06, 14); |
var today = new Date(); |
if (myDate > today) { |
alert("Today is before 14th July 2010"); |
} |
else { |
alert("Today is after 14th July 2010"); |
} |
</script> |
</head> |
<body> |
</body> |
</html> |
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