Q:

what is sessionStorage

// Save data to sessionStorage
sessionStorage.setItem('key', 'value');

// Get saved data from sessionStorage
let data = sessionStorage.getItem('key');

// Remove saved data from sessionStorage
sessionStorage.removeItem('key');

// Remove all saved data from sessionStorage
sessionStorage.clear();
4
	var setsession = window.sessionStorage.setItem("animals", "cat");
	var getsession = window.sessionStorage.getItem("animals");
	console.log(getsession);
4
sessionStorage is like localStorage
except that it is cleared when the page session ends 
		— that is, when the page is closed. 

 	
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