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<html><head><script>function clickCounter() { const x = document.getElementById("result"); if (typeof(Storage) !== "undefined") { if (sessionStorage.clickcount) { sessionStorage.clickcount = Number(sessionStorage.clickcount)+1; } else { sessionStorage.clickcount = 1; } x.innerHTML = "You have clicked the button " + sessionStorage.clickcount + " time(s) in this session!"; } else { x.innerHTML = "Sorry, no Web storage support!"; }}</script></head><body><h1>sessionStorage</h1><button onclick="clickCounter()" type="button">Click me!</button><p id="result"></p><p>Click the button to see the counter increase.</p><p>Close the browser tab (or window), and try again, and the counter is reset.</p></body></html>