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In this tutorial we will create a Simple Stopwatch using JavaScript. JavaScript is a scripting or programming language that allows you to implement complex things on web pages. It is a text-based programming language meant to run as part of a web-based application. It is an interpreted programming language that has a capabilities of Object-Oriented. So Let's do the coding...
Getting started:
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 render a virtual stopwatch that can monitor your activity time. To do this just copy and write these block of codes as shown below inside the text editor and save it as script.js inside the js folder.
⚙ Live Demo
There you have it we successfully created a Simple Stopwatch 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
Getting started:
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
=
"container-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 - Simple Stopwatch</
h3
>
- <hr
style
=
"border-top:1px dotted #ccc;"
/
>
- <center
><h1
id
=
"timer"
style
=
"font-size:72px;"
>
00:00:00s</
h1
></
center
>
- <br
/
>
- <div
style
=
"text-align:center;"
>
- <button
class
=
"btn btn-success"
onclick
=
"startTimer(this)"
>
START</
button
>
- <button
class
=
"btn btn-danger"
onclick
=
"stopTimer()"
>
STOP</
button
>
- <button
class
=
"btn btn-warning"
onclick
=
"resetTimer()"
>
RESET</
button
>
- </
div
>
- </
div
>
- <script
src
=
"js/script.js"
></
script
>
- </
body
>
- </
html
>
Creating the Script
This code contains the script of the application. This code will render a virtual stopwatch that can monitor your activity time. To do this just copy and write these block of codes as shown below inside the text editor and save it as script.js inside the js folder.
- var
display =
document.getElementById
(
'timer'
)
;
- var
secs =
0
;
- var
mins =
0
;
- var
hrs =
0
;
- var
h =
""
;
- var
m =
""
;
- var
s =
""
;
- var
timer;
- function
countTimer(
)
{
- secs++;
- if
(
secs >=
60
)
{
- secs =
0
;
- mins++;
- if
(
mins >=
60
)
{
- mins =
0
;
- hrs++;
- }
- }
- h =
hrs ?
hrs >
9
?
hrs :
"0"
+
hrs :
"00"
;
- m =
mins ?
mins >
9
?
mins :
"0"
+
mins :
"00"
;
- s =
secs >
9
?
secs :
"0"
+
secs;
- display.innerHTML
=
h+
":"
+
m+
":"
+
s+
"s"
;
- timerDuration(
)
;
- }
- function
timerDuration(
)
{
- if
(
hrs !=
99
)
{
- timer =
setTimeout(
countTimer,
100
)
;
- }
- }
- function
startTimer(
btn)
{
- btn.setAttribute
(
'disabled'
,
'disabled'
)
;
- timerDuration(
)
;
- }
- function
stopTimer(
)
{
- document.getElementsByClassName
(
'btn-success'
)
[
0
]
.removeAttribute
(
'disabled'
)
;
- clearTimeout(
timer)
;
- }
- function
resetTimer(
)
{
- document.getElementsByClassName
(
'btn-success'
)
[
0
]
.removeAttribute
(
'disabled'
)
;
- clearTimeout(
timer)
;
- display.innerHTML
=
"00:00:00s"
;
- secs =
0
;
- mins =
0
;
- hrs =
0
;
- h =
""
;
- m =
""
;
- s =
""
;
- }
⚙ Live Demo
There you have it we successfully created a Simple Stopwatch 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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