To call a JavaScript function in an alert box, you can use the alert() function, a built-in function in JavaScript that displays an alert dialog with a specified message. An alert box is a simple dialog box that displays a message to the user and provides an OK button. It is a built-in function in JavaScript that is often used for debugging or displaying simple notifications to the user. Here's an example of how to use the alert() function in JavaScript − alert("Hello, World!"); // displays an alert box with the message "Hello, World!" The alert() function takes a ... Read More

In this tutorial, we will learn to center the JavaScript alert box. In JavaScript, an alert box is useful to show users some message, information, warning, success, etc. Let’s understand it by real-world example when you open any website on the web browser and start to authenticate by entering your username and password. When you click the submit button, it gives a message in an alert box like the password should of be 8 or more characters, or sign in successfully. Users can create the alert box using JavaScript's alert() method. Unfortunately, the default alert box doesn’t allow us to ... Read More

To customize the position of an alert box, use the CSS “top” and “left” properties. We have a custom alert box, which we’ve created using jQuery and styled with CSS.ExampleYou can try to run the following code to customize the position of an alert box −Live Demo                          function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {                confirmBox.hide();   ... Read More

To show the JavaScript alert box in the middle, you need to use the custom alert box. Under that, style it accordingly and position it to the center. Use the “top” and “left” CSS properties to achieve this. Set them as 50%, but as you can see a button below, use the property to 40% to align it with the button:ExampleLive Demo                          function functionAlert(msg, myYes) {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);     ... Read More

To set the width and height of an alert box in JavaScript, you need to use the custom alert box. This alert box is styled with CSS.Set the width and height of the alert box using the following code, which uses jQuery, a JavaScript library −Example                                function functionAlert(msg, myYes)          {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function()       ... Read More

To check if an array includes an object in JavaScript, is useful while managing a collection of data to verify if any specific object is present. We will be discussing four different approaches with examples to check if an array includes an object in JavaScript. In this article, we are having an array and an object. Our task is to check if an array includes an object in JavaScript. Approaches to check if array includes an object Here is a list of approaches to check if an array includes an object in JavaScript which we will be discussing in ... Read More

To test if a cookie has expired in JavaScript, add the following condition and check −if( !($.cookie('myCookie') === null) ) {    // Do something (cookie exists) } else {    // Do something (cookie expired) }You can also check it using a single line code −checkCookie = $.cookie('myCookie') === null ? ( /*Condition TRUE...*/ ) : ( /*Condition FALSE...*/ );

To change the styling of JavaScript alert button, use the custom alert box. You can try to run the following code to change the styling of alert buttons. The button looks different and more fancy −ExampleLive Demo                                function functionAlert(msg, myYes)  {             var confirmBox = $("#confirm");             confirmBox.find(".message").text(msg);             confirmBox.find(".yes").unbind().click(function() {                confirmBox.hide();             }); ... Read More

In this tutorial, we will learn to change the color of the alert box in JavaScript. Also, we will learn to style the whole alert box, including the content of the alert box. In JavaScript, the alert box is the best way to show the success, failure, or informative messages to the user, when the user performs some operation on the application. The programmers can create the default alert box using the alert() method, but they can’t change the default style of the alert() box. To change the style of the alert box, programmers need to create the custom alert ... Read More

In this tutorial, we will learn how to preserve leading 0 with JavaScript numbers. Sometimes we need to sort strings that are similar to numbers. For example, 10 comes before 2, but after 02 in the alphabet. Leading zeros are used to align numbers in ascending order with alphabetical order. Following are the methods used to preserve leading zero with JavaScript numbers. Using the Number as a String The number is converted into a string using string manipulation, and the leading zero is preserved. Syntax myFunc2('Neel', 27, '0165') The function myFunc2() is called, and the values are passed ... Read More