JaKK0
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In this tutorial we will create a Calculate Age Base On Birthday using JavaScript. This code will calculate a person age by inputting a person birth date in the textbox. The code itself use a new Date() function to compute the age by getting the difference between the today and the inputted date. This code is free to use, you can modify it as your own,
We will be using JavaScript as a server-side scripting language because It allows greater control of your web page behavior than HTML alone. It is embedded in HTML that responsible to allow user to interact with the computer .
Getting started:
First you have to download bootstrap framework, this is the link for the bootstrap that I used for the layout design https://getbootstrap.com/.
The Main Interface
This code contains the interface of the application. To create this just write these block of code inside the text editor and save this as index.html.
Creating the Script
This code contains the script of the application. This code will calculate a person age automatically. To do this just copy and write these block of codes inside the text editor, then save it as script.js inside the js folder.
There you have it we successfully created a Calculate Age Base On Birthday using JavaScript. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!
Download
We will be using JavaScript as a server-side scripting language because It allows greater control of your web page behavior than HTML alone. It is embedded in HTML that responsible to allow user to interact with the computer .
Getting started:
First you have to download bootstrap framework, this is the link for the bootstrap that I used for the layout design https://getbootstrap.com/.
The Main Interface
This code contains the interface of the application. To create this just write these block of code inside the text editor and save this as index.html.
- <!DOCTYPE html>
- <html
lang
=
"en"
>
- <head
>
- <meta
charset
=
"UTF-8"
name
=
"viewport"
content
=
"width=device-width, initial-scale=1"
/
>
- <link
rel
=
"stylesheet"
type
=
"text/css"
href
=
"css/bootstrap.css"
/
>
- </
head
>
- <body
>
- <nav class
=
"navbar navbar-default"
>
- <div
class
=
"contriner-fluid"
>
- <a
class
=
"navbar-brand"
href
=
"https://sourcecodester.com"
>
Sourcecodester</
a
>
- </
div
>
- </
nav>
- <div
class
=
"col-md-3"
></
div
>
- <div
class
=
"col-md-6 well"
>
- <h3
class
=
"text-primary"
>
JavaScript - Calculate Age Base On Birthday</
h3
>
- <hr
style
=
"border-top:1px dotted #ccc;"
/
>
- <div
class
=
"col-md-3"
></
div
>
- <div
class
=
"col-md-6"
>
- <div
class
=
"form-inline"
>
- <input
type
=
"date"
id
=
"birthday"
/
>
- <button
class
=
"btn btn-primary"
onclick
=
"getAge();"
>
Calculate</
button
>
- <h2
>
Your age is: <span
id
=
"result"
class
=
"text-primary"
></
span
></
h2
>
- </
div
>
- </
div
>
- </
div
>
- <script
src
=
"js/script.js"
></
script
>
- </
body
>
- </
html
>
Creating the Script
This code contains the script of the application. This code will calculate a person age automatically. To do this just copy and write these block of codes inside the text editor, then save it as script.js inside the js folder.
- function
getAge(
)
{
- var
date =
document.getElementById
(
'birthday'
)
.value
;
- if
(
date ===
""
)
{
- alert(
"Please complete the required field!"
)
;
- }
else
{
- var
today =
new
Date
(
)
;
- var
birthday =
new
Date
(
date)
;
- var
year =
0
;
- if
(
today.getMonth
(
)
<
birthday.getMonth
(
)
)
{
- year =
1
;
- }
else
if
(
(
today.getMonth
(
)
==
birthday.getMonth
(
)
)
&&
today.getDate
(
)
<
birthday.getDate
(
)
)
{
- year =
1
;
- }
- var
age =
today.getFullYear
(
)
-
birthday.getFullYear
(
)
-
year;
- if
(
age <
0
)
{
- age =
0
;
- }
- document.getElementById
(
'result'
)
.innerHTML
=
age;
- }
- }
There you have it we successfully created a Calculate Age Base On Birthday using JavaScript. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!
Download
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