What is the window object in JavaScript?

The window object is a global object that has the properties pertaining to the current DOM document, which is what’s in the tab of a browser. The document property of the window object has the DOM document and associated nodes and methods that we can use to manipulate the DOM nodes and listen to events for each node.

What do you mean by window object?

The window object represents an open window in a browser. If a document contain frames (<iframe> tags), the browser creates one window object for the HTML document, and one additional window object for each frame.

What is window and document object in JavaScript?

Every web page resides inside a browser window which can be considered as an object. A Document object represents the HTML document that is displayed in that window. … It is the outmost element of the object hierarchy. Document object − Each HTML document that gets loaded into a window becomes a document object.

What are the properties of the window object in JavaScript?

JavaScript Window Object Properties

Property Description
innerHeight specifies the inner height of the window’s content area.
innerWidth specifies the inner width of the window’s content area.
length specifies the number of frames contained in the window.
location specifies the location object for window
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What is window object in DOM?

The window object represents the window that contains the DOM document. … document points to the document object loaded in the window. Properties and methods of this object can be called without referencing window explicitly, because it represents the global object. So, the previous property window.

What is the use of window object?

Properties of Window Object

Property Name Purpose
Self It provides another way to refer the current window.
Status It overrides the defaultStatus and places a message in the status bar.
Top It returns a reference to the topmost window containing a frame if many windows are opened.
Window It returns the current window or frame.

What are different types of window objects?

Methods of window object

displays the alert box containing message with ok button. displays the confirm dialog box containing message with ok and cancel button. displays a dialog box to get input from the user. opens the new window.

What is the difference between window and document object?

Well, the window is the first thing that gets loaded into the browser. … The document object is your html, aspx, php, or other document that will be loaded into the browser. The document actually gets loaded inside the window object and has properties available to it like title, URL, cookie, etc.

Is window and document same?

window. document or just document is the main object of the potentially visible (or better yet: rendered) document object model/DOM. Since window is the global object, you can reference any properties of it with just the property name – so you do not have to write down window. – it will be figured out by the runtime.

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Why We Use window in JS?

The Window interface represents a window containing a DOM document; the document property points to the DOM document loaded in that window. A window for a given document can be obtained using the document. … A global variable, window , representing the window in which the script is running, is exposed to JavaScript code.

Is Windows part of Dom?

The window object is not part of the DOM. It is a host object implemented as the “global object” to complete an ECMAScript implementation. It has its own standard which is available from the W3C.

Is 0 false in JS?

In JavaScript “0” is equal to false because “0” is of type string but when it tested for equality the automatic type conversion of JavaScript comes into effect and converts the “0” to its numeric value which is 0 and as we know 0 represents false value. So, “0” equals to false.

What is alert () method?

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.

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