Introduction

In the world of web development, creating customized pop-up windows is an essential skill for every developer to have. Among the many methods of achieving this, jsprompt provides an excellent platform for creating pop-up windows that accept user inputs. In this article, we will discuss what jsprompt is, how it works, and how to use it in creating custom pop-up windows.

What is jsprompt?

Jsprompt is a built-in JavaScript function that prompts the user to enter input in a pop-up window. It is similar to the alert and confirm functions but differs in that it has a text input field that allows the user to type in information. This function is typically used in various web applications for validations, input verifications, and other similar purposes.

How does jsprompt work?

The jsprompt function takes two arguments. The first argument is a string that specifies the message to display to the user, while the second argument is an optional string parameter that holds a default value to be displayed inside the input field. Here's an example of how to use the jsprompt function:

```javascript

var response = prompt("Please enter your name", "John Doe");

```

In the above code snippet, the first argument displays the message "Please enter your name," while the second argument shows a default value of "John Doe." When the code above runs on a web page, it displays a pop-up window as shown in the image below:


Once the user types in their name and clicks "OK," the value entered by the user is stored in the "response" variable.

Creating a custom pop-up window using jsprompt

Creating a custom pop-up window with jsprompt is no different from creating a regular pop-up window. The difference lies in the fact that the jsprompt function allows the user to enter input. In this section, we will create a custom pop-up window that prompts the user to enter their email address.

To get started, create a new HTML file and add the following code snippet to it:

```html

Show Custom Popup

```

In the code above, a "Show Custom Popup" button is added to the page, and an onclick event is added to the button that triggers the showCustomPopup() function. Once the button is clicked, the showCustomPopup() function is executed, which shows the pop-up window for the user to enter their email address.

After the user enters their email address and clicks "OK," the input value is stored in the "email" variable. If the user clicks "Cancel," the value stored in "email" will be null. To ensure that the user entered a valid email address, we can add some email validation code to our function, as shown below:

```javascript

function showCustomPopup() {

var email = prompt("Please enter your email address");

if (email != null) {

if (isValidEmail(email)) {

alert("Thank you for providing your email address: " + email);

} else {

alert("Invalid email address! Please try again.");

showCustomPopup();

}

}

}

function isValidEmail(email) {

var regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

return regex.test(email);

}

```

In the code above, the isValidEmail() function is called to validate the email address entered by the user. If the email is valid, a message thanking the user for entering their email is displayed. Otherwise, the user is prompted to enter their email again.

Conclusion

In conclusion, jsprompt provides a simple yet powerful way to create custom pop-up windows that can be used for various purposes. As we have seen, creating a custom pop-up window is relatively easy, and the jsprompt function allows us to add input fields that accept user input. By using the jsprompt function, we can create more interactive web applications with ease.