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<!DOCTYPE html> <html> <head> <script> function clickCounter() { const x = document.getElementById("result"); if (typeof(Storage) !== "undefined") { if (localStorage.clickcount) { localStorage.clickcount = Number(localStorage.clickcount)+1; } else { localStorage.clickcount = 1; } x.innerHTML = "您已点击按钮 " + localStorage.clickcount + " 次！"; } else { x.innerHTML = "抱歉，不支持 Web 存储！"; } } </script> </head> <body> <h1>localStorage</h1> <button onclick="clickCounter()" type="button">点击我！</button> <p id="result"></p> <p>点击按钮查看计数器增加。</p> <p>关闭浏览器标签页（或窗口），然后重试，计数器将继续计数。</p> </body> </html>