![]() Similarly, we could change back to none once the user clicks on the close icon. We can use JavaScript to toggle the popup style property we can do this by accessing the DOM element and its style property and changing the display type from none to block will make the popup show up. The question is, how do we toggle a popup? We can do that by using JavaScript or jQuery. But the overlay element is set to none, so it does not show up at the moment. When a popup opens in the middle of the screen, it will get the user’s attention because that will be the only thing a user will see clearly. In doing so, we have managed to hide the main content. Then we created a popup element and styled it to come above the overlay element and the center of the webpage. JavaScript popup windows however, are more powerful. If you only want to open a new browser window you can add the target'blank' attribute within the element (see this article on opening a new window in HTML).![]() Popup windows are different to simply opening a new browser window. But most importantly, we have an overlay element that will be above all of the content in a slight black color, thus making it difficult for the user to see that content. You can use JavaScript to create popup windows. When the alert box is displayed to the user, the user needs to press ok and proceed.
Alert Box: It is used when a warning message is needed to be produced. There are three types of pop-up boxes in JavaScript namely Alert Box, Confirm Box and Prompt Box. In this simple example, we have created a button that will show the popup. In Javascript, popup boxes are used to display the message or notification to the user.
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