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Alert is a JavaScript statement. Alert is a common method of window window objects in JavaScript scripting language, which is mainly used to display an alert box with a specified message and a "confirm" button, the syntax "window.alert (message)".

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Alert is a JavaScript statement.

Alert is a pop-up window function used in HTML DOM, which means "reminder" in Chinese.

Alert is a common method of window window object in JavaScript scripting language; its main use is the language of pop-up dialog box after you define a certain function by performing the corresponding operation.

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

Specific grammatical format:

Window.alert (message)

The function argument is the content displayed in the pop-up box; the prefix window can be omitted.

Tip:

Message dialogs are provided by the system, so style fonts may vary from browser to browser.

The message dialog box is exclusive, that is, nothing else can be done until the user clicks the button in the dialog box.

Message dialogs can usually be used to debug programs.

Example:

Alert ("Hello!"); alert ("Welcome!") ; alert ('Welcome to\ nboat')

Parsing: for the second and third statements above, only the third statement can wrap the line. Refer to the ASCII code table, and you cannot wrap the line using the br tag in HTML.

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