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  2. The prompt() method displays a dialog box that prompts the user for input. The prompt() method returns the input value if the user clicks "OK", otherwise it returns null. Note. A prompt box is used if you want the user to input a value. When a prompt box pops up, the user will have to click either "OK" or "Cancel" to proceed.

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    • Overview
    • Syntax
    • Examples
    • Notes
    • Browser compatibility

    window.prompt() instructs the browser to display a dialog with an optional message prompting the user to input some text, and to wait until the user either submits the text or cancels the dialog.

    Under some conditions — for example, when the user switches tabs — the browser may not actually display a dialog, or may not wait for the user to submit text or to cancel the dialog.

    Parameters

    message Optional\t A string of text to display to the user. Can be omitted if there is nothing to show in the prompt window. defaultValue Optional\t A string containing the default value displayed in the text input field.

    Return value

    A string containing the text entered by the user, or null.

    When the user clicks the OK button, text entered in the input field is returned. If the user clicks OK without entering any text, an empty string is returned. If the user clicks the Cancel button, this function returns null.

    The above prompt appears as follows (in Chrome on macOS):

    A prompt dialog contains a single-line textbox, a Cancel button, and an OK button, and returns the (possibly empty) text the user entered into that textbox.

    Please note that result is a string. That means you should sometimes cast the value given by the user. For example, if their answer should be a Number, you should cast the value to Number.

    Dialog boxes are modal windows; they prevent the user from accessing the rest of the program's interface until the dialog box is closed. For this reason, you should not overuse any function that creates a dialog box (or modal window).

    Alternatively element can be used to take user inputs.

    BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

  3. Prompt Box. A prompt box is often used if you want the user to input a value before entering a page. When a prompt box pops up, the user will have to click either "OK" or "Cancel" to proceed after entering an input value. If the user clicks "OK" the box returns the input value. If the user clicks "Cancel" the box returns null.

  4. JavaScript Prompt Try it

  5. The prompt() method in JavaScript is used to display a dialog box that prompts the user for input. It's particularly useful when you need to gather data from the user before proceeding. Syntax and Working.

  6. The W3Schools online code editor allows you to edit code and view the result in your browser

  7. Try it. confirm () Use the confirm() function to take the user's confirmation before starting some task. For example, you want to take the user's confirmation before saving, updating or deleting data. Syntax: bool window.confirm([message]); The confirm() function displays a popup message to the user with two buttons, OK and Cancel .

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