Web Reference: 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. Aug 5, 2025 · When the alert () function is called, the browser will display a pop-up box with your specified message. The user must click the OK button to close the box and continue interacting with the webpage. JavaScript provides built-in global functions to display popup message boxes for different purposes. alert (message): Display a popup box with the specified message with the OK button. confirm (message): Display a popup box with the specified message with OK and Cancel buttons.
YouTube Excerpt: Learn how to alert, prompt, and confirm in
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