Performing Basic Window function in JavaScript

Performing Basic Window function in JavaScript

The Window object is supported by all the browsers and is used to represent a browser’s window. We can perform various functions using the Window Objects. Following are the widely used Window functions with their description:

Window Function Description Example
window.alert( ) This method displays an alert box with your message and OK button. window.alert(“Hello World”);
window.confirm( ) This method displays a dialog box with an optional message and two buttons i.e. OK and Cancel. if (window.confirm(“Do you want to exit?”)) {window.alert(“Thanks for Visiting!”); }
window.prompt( ) This method opens a dialog box that prompts a user for input. prompt(“What’s your name?”);
window.print( ) This method prints the current screen. window.print( ); ) This method is used to open a new browser window or a new tab. This is mainly used to open a link in a new tab.“”);
window.close( ) This method closes the current window. This only works if the window was opened using newWindow =“”, “newWindow”, “width=200, height=100”);


window.history.back( ) This method loads the previous URL from the history list. window.history.back();
window.history.forward( ) This method loads the next URL from the history list. window.history.forward();
window.localStorage( ) This method is used to store & retrieve data (key/ value pair) from the browser’s local storage. window.localStorage.setItem(‘myName’, ‘Rudra’);


window.sessionStorage( ) This is same as the above function, the difference is that the data gets deleted once the session is closed (i.e. browser’s tab is closed) window.sessionStorage.setItem(‘myName’, ‘Rudra’);


*Note: Please try the above examples in your browser’s console.


  • Barry Allen

    A Full Stack Developer with 10+ years of experience in different domain including SAP, Blockchain, AI and Web Development.

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