Alert Box. An alert box is often used if you want to make sure information comes through to the user. When an alert box pops up, the user will have to click "OK" to proceed. Syntax

The alert() method displays an alert box with a message and an OK button. The alert() method is used when you want information to come through to the user.

Alert messages can be used to notify the user about something special: danger, success, information or warning. × Danger! Indicates a dangerous or potentially negative action.

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JS Alert (alert.js) The alert plugin include options and methods to close alert messages. For a tutorial about Alerts, read our Bootstrap Alerts Tutorial.

The confirm() method displays a dialog box with a message, an OK button, and a Cancel button. The confirm() method returns true if the user clicked "OK", otherwise false.

JavaScript Display Possibilities. JavaScript can "display" data in different ways: Writing into an HTML element, using innerHTML or innerText. Writing into the HTML output using …

This alert box indicates a dangerous or potentially negative action. Alerts are created with the .alert class, followed by one of the four contextual classes .alert-success , .alert-info , .alert …

JavaScript Form Validation. HTML form validation can be done by JavaScript. If a form field (fname) is empty, this function alerts a message, and returns false, to prevent the form from …

Learn how to create a Modal Box with CSS and JavaScript. How To Create a Modal Box A modal is a dialog box/popup window that is displayed on top of the current page: