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JavaScript Confirm

Home » Software Development » Software Development Tutorials » JavaScript Tutorial » JavaScript Confirm

JavaScript Confirm

Introduction to JavaScript Confirm

In JavaScript confirm box is the subtype of the pop-up box. These pop up boxes are used to give information about further steps. Generally, Popup boxes are 3 types

  1. Alert box
  2. Confirm box
  3. Prompt box

For Time being now we will discuss the confirm box in JavaScript. Confirm box in JavaScript is used to take the permission from the user by clicking the Ok button or Cancel button. If we click the Ok button then action will move to the next step, if we click the Cancel button then it will terminate the action there itself.

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Real-time Example: Let suppose we have an online application form for payment method. After filling the online payment application form, if you want to proceed with payment then it will display a pop up box. If you want to move further we have to click the Ok button, if we click the Cancel button then the payment stop there will itself and come back to the home page.

Syntax

Confirm(“Click Ok  or Cancel”);

How does Confirm box work in JavaScript?

A Confirm box is used for taking confirmation authentication from the user to move a further step.

When a prompt box pop up opens, it has two buttons like Ok and Cancel. Based on clicking the button action move to further step. When a Confirm box appears user has to either choose OK or Cancel If the user press “OK” then the action moves to the next step for processing. If the user press the “Cancel” button then action will be canceled and stop the process there itself.

Note: “Cancel” action has null value by default.

Examples to Implement JavaScript Confirm

Below are some examples of JavaScript Confirm:

Example #1

Code:

<!DOCTYPE html>
<html>
<title>Confirm Box</title>
<!--CSS Styles-->
<style>
p
{
border: double 8px red;
font-size: 28px;
color: green;
text-align: justify;
}
h1
{
color: blue;
text-align:center;
}
</style>
<!--JavaScript Logic-->
<script>
function getYourDecision() {//function definition
var course = confirm("Are you interested to take online course in EDUCBA?");//taking confirm action from user
if (course==true)  //if press ok then value is true
{
document.write("<h2 style='color:green'>Congratulations! You have taken right decision! You will be landed in right website to learn IT Courses.</h2>");//if we press OK then it will display this message
}
else    //if press Cancel then value is false
{
document.write("<h2 style='color:red'>Sorry! you can think about this why don't you take courses in EDUCBA!");//if we press Cancel then it will display this message
}
}
getYourDecision();
</script>
<body>
<div>
<h1>Confirm Box Real Time Example</h1>
<p>Real time Example: Let suppose we have online application form for payment method. After filling online payment application form, if you want to proceed with payment then it will display pop up box. If you want to move further we have to click Ok button, if we click Cancel button then payment stop there will itself and come back to home page.</p>
</div>
</body>
</html>

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Output:

Before Press Ok button:

Before Press Ok button

After Press Ok button:

After Press Ok button

After press cancel button:

press cancel button

Example #2

Code:

<!DOCTYPE html>
<html>
<title>Confirm Box</title>
<!--CSS Styles-->
<style>
p
{
border: dotted 8px blue;
font-size: 20px;
color: red;
text-align: justify;
}
h1,h2
{
color: green;
text-align:center;
}
.button
{
text-align: center;
}
</style>
<!--JavaScript Logic-->
<script>
function getMyAge() {//function definition
var age;
if (confirm("Are you 24 years old?"))  //if press ok then value is true
{
age="I am 24 years old";
}
else    //if press Cancel then value is false
{
age="I am 1 year old"
}
document.getElementById("output").innerHTML = age;
}
getMyAge();
</script>
<body>
<div>
<h1>Working Principle of confirm Box</h1>
<p>A Confirm box is used for taking confirmation authentication from the user to move further step.
When a prompt box pop up opens, it have to buttons like Ok and Cancel. Based on clicking the button action move to further step.
When a Confirm box appears user has to either choose OK or Cancel button.
If the user press "OK" then the action move to next step for processing.
If user press the "Cancel" button then action will be cancelled and stop the process there itself.
Note: "Cancel" action have null value by default.
Syntax:
Confirm(“Click Ok  or Cancel”);
</p>
<h2>Click Get My Age button to see Confirm pop up box Message</h2>
<button class="button" onclick="getMyAge()">Get My Age</button>
<p id="output"></p>
</div>
</body>
</html>

 Output:

Before clicking the Get My Age button:

clicking the Get My Age button

After clicking the Get My Age button:

javascript confirm5

After click OK button:

javascript confirm6

After click Cancel button:

javascript confirm7

Example #3

Code:

<!DOCTYPE html>
<html>
<title>Confirm Box</title>
<!--CSS Styles-->
<style>
p
{
border: ridge 5px brown;
font-size: 28px;
color: blue;
text-align: justify;
}
h1,h2
{
color: green;
text-align:center;
}
.button
{
text-align: center;
}
button
{
font-size: 25px;
color: white;
background: pink;
}
</style>
<body>
<div>
<h1>Brief Introduction of confirm Box</h1>
<p>In JavaScript confirm box is the sub type of pop up box. This pop up boxes are used give the information about further step. Generally, Popup boxes are 3 types Alert box Confirm box Prompt box
For Time being now we will discuss about the confirm box in JavaScript. Confirm box in JavaScript is used to take the permission from the user by clicking the Ok button or Cancel button. If we click Ok button then action will move to next step, if we click Cancel button then it will terminate the action there itself.
</p>
<h2>Click Get My Java Course button to see Confirm pop up box Message</h2>
<div  class="button" >
<button onclick="getMyCourse()">Get My Java Course</button>
</div>
<p id="output"></p>
</div>
<!--JavaScript Logic-->
<script>
function getMyCourse() {//function definition
var course=prompt("Please Enter any course name");
var temp;
if(course=="Java")
{
temp=true;
}
else
{
temp=false;
}
var confirmMes=confirm("Have you interested on "+course+" course?");
if (confirmMes)  //if press ok then value is true
{
age="Yes, you are correct, choosen course is "+course;
}
else    //if press Cancel then value is false
{
age="Sorry! You have cancelled entered course"
}
document.getElementById("output").innerHTML = age;
}
getMyCourse();
</script>
</body>
</html>

Output:

javascript confirm8

javascript confirm9

If we Click Ok:

javascript confirm10

If in case, we Click Cancel:

javascript confirm11

Conclusion

JavaScript confirm box is used to take the confirmation from the user to move to the next step. It has 2 buttons like Ok and Cancel. Ok action moved to the next step, Cancel action terminates the process.

Recommended Articles

This is a guide to JavaScript Confirm. Here we discuss an introduction to JavaScript Confirm, syntax, how does it work, examples with code and output. You can also go through our other related articles to learn more –

  1. JavaScript Alert
  2. JavaScript Message Box
  3. JavaScript Date parse
  4. JavaScript Popup Box

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