What does the alert method do in JavaScript?

What does the alert method do in JavaScript?

The alert() method in JavaScript is used to display a virtual alert box. It is mostly used to give a warning message to the users. It displays an alert dialog box that consists of some specified message (which is optional) and an OK button.

How to check browser ” document mode ” in IE?

1Found a way to check for document mode: use document.documentMode. It returns an integer (so 7 for document mode IE7 standards), 5 for Quirks mode. It will be undefinedfor non IE browsers.

What does document.documentmode do in IE9?

You can use document.documentMode to return exactly what document mode IE is using. Meaning that if you have your browser mode set to IE9, but your document mode to IE8 it will return document.documentMode == 8 (while the userAgent string will still show up as IE9).

How to display an alert box in HTML?

Here, there is an HTML button which is used for displaying the alert box. We are using the onclick attribute and call the fun () function where the alert () is defined. In this example, there is an alert dialog box with a message and an OK button.

Which is paramter does alert ( ) take?

The alert () function takes a paramter of any type e.g., string, number, boolean etc. So, no need to convert a non-string type to a string type. Sometimes you need to take the user’s confirmation to proceed. For example, you want to take the user’s confirmation before saving updated data or deleting existing data.

When do you use the alert dialog box?

The alert dialog should be used for messages which do not require any response on the part of the user, other than the acknowledgement of the message. Dialog boxes are modal windows – they prevent the user from accessing the rest of the program’s interface until the dialog box is closed.