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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. × Success! Indicates a successful or positive action. × Info! Indicates a neutral informative change or action. × Warning!
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. window.alert (" sometext "); The window.alert() method can be written without the window prefix. Example. alert ("I am an alert box!"); Try it Yourself » Confirm Box.
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.
Learn how to create alert messages with CSS. Alerts Alert messages can be used to notify the user about something special: danger, success, information or warning.
Alert messages can be used to notify the user about something special: danger, success, information or warning. Try it yourself here: https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_alert. Tip: Also check out Notes.
The Javascript alert dialog box is used to display a warning message to the users. Note: Alert dialog box gives one button “OK”. Example: alert("Warning message."); document.write ("Warning message.");
Alert as a Card. Use a w3-card class if you want the alert to be displayed as a card:
