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We look for libraries like Date-fns and Moment when we need to work with date and time in JavaScript. But you can just use the built-in date object to access the current date or time while writing code in JavaScript. In this article, we will discuss how to implement the JavaScript date object in the following sequence:
JavaScript Date
The JavaScript date object is used to obtain year, month and day. You can display a timer on the webpage with the help of JavaScript date object. Also, you can use different Date constructors to create the date object. This provides methods to get and set day, month, year, hour, minute and seconds.
There are different ways to create a Date object using Date() constructor.
Syntax:
1 2 3 4 | new Date( )new Date(milliseconds)new Date(datestring)new Date(year,month,date[,hour,minute,second,millisecond ]) |
Parameters:
- No Argument − The Date() constructor creates a Date object set to the current date and time.
- milliseconds − When one numeric argument is passed, it is taken as the internal numeric representation of the date in milliseconds.
- datestring − It is a string representation of a date, in the format accepted by the Date.parse() method.
- year − This integer value represents the year. You should always specify the year in full.
- month − It represents the month, beginning with 0 for January to 11 for December.
- date − The date is used for representing the day of the month.
- hour − This Integer value represents the hour of the day (24-hour scale).
- minute − It represents the minute segment of a time reading.
- second − This represents the second segment of a time reading.
- millisecond − This represents the millisecond segment of a time reading.
Now that you know the different parameters used in JavaScript date, let’s move on to the different JavaScript date methods.
JavaScript Date Methods
There are different JavaScript Date Methods and here is a list along with their description:
| Property | Description |
Date() | It returns today’s date and time. |
getDate() | It returns the day of the month for the specified date according to local time. |
getDay() | This gives the day of the week for the specified date according to local time. |
getFullYear() | This returns the year of the specified date according to local time. |
getHours() | It returns the hour in the specified date according to local time. |
getMilliseconds() | Shows the milliseconds in the specified date according to local time. |
getMinutes() | This returns the minutes in the specified date according to local time. |
getMonth() | It returns the month in the specified date according to local time. |
getSeconds() | Returns the seconds in the specified date according to local time. |
getTime() | This returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC. |
getTimezoneOffset() | This returns the time-zone offset in minutes for the current locale. |
getYear() | It returns the year in the specified date according to local time. |
setDate() | Used to set the day of the month for a specified date according to local time. |
setFullYear() | It sets the full year for a specified date according to local time. |
setHours() | It sets the hours for a specified date according to local time. |
setMilliseconds() | This sets the milliseconds for a specified date according to local time. |
setMinutes() | Sets the minutes for a specified date according to local time. |
setMonth() | It sets the month for a specified date according to local time. |
setSeconds() | It sets the seconds for a specified date according to local time. |
setTime() | This sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC. |
These were some of the most commonly used date methods. Now let’s take an example and see how the date objects are used in JavaScript.
Example: Date in JavaScript
Let’s take an example to print date/month/year:
1 2 3 4 5 6 7 | <script>var date=new Date();var day=date.getDate();var month=date.getMonth()+1;var year=date.getFullYear();document.write("<br>Date is: "+day+"/"+month+"/"+year);</script> |
Output:
Date is: 17/9/2019
Now, let’s take another example to print current time of system:
1 2 3 4 5 6 7 8 | Current Time: <span id="txt"></span><script>var today=new Date();var h=today.getHours();var m=today.getMinutes();var s=today.getSeconds();document.getElementById('txt').innerHTML=h+":"+m+":"+s;</script> |
Output:
Current Time: 17:56:8
With this, we have come to the end of our article. I hope you understood how JavaScript Date objects are used.
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