How to use the alert method in JavaScript

This article introduces the relevant knowledge of "how to use the alert method in JavaScript". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In JavaScript, the alert () method is used to display an alert box with a specified message and an OK button with the syntax "alert (message)"; where message is used to represent the plain text to be displayed in the dialog box that pops up on the window.

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

What is the use of alert in JavaScript

Definition and usage

The alert () method displays a warning box with a specified message and an OK button.

Grammar

Alert (message)

Parameter description

Plain text (instead of HTML text) that message wants to display in a dialog box that pops up on window

Examples are as follows:

Function disp_alert () {alert ("I am a message box!") }