html-php/20240215-cookie.html at master · hsd325/html-php · GitHub

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<!-- cookie的練習 -->
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>cookie練習</title>
</head>

<body>

    <script>
        setCookie("myID01", "123456", 7);
        setCookie("myID02", "22222", 7);

        console.log(getCookie("myID01"));
        console.log(getCookie("myID02"));

        // 創造cookie
        function setCookie(cname, cvalue, exdays) {
            const d = new Date();
            d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
            let expires = "expires=" + d.toUTCString();
            document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
        }
        // 顯示指cookie的value的值
        function getCookie(cname) {
            let name = cname + "=";
            let decodedCookie = decodeURIComponent(document.cookie);
            let ca = decodedCookie.split(';');
            for (let i = 0; i < ca.length; i++) {
                let c = ca[i];
                while (c.charAt(0) == ' ') {
                    c = c.substring(1);
                }
                if (c.indexOf(name) == 0) {
                    return c.substring(name.length, c.length);
                }
            }
            return "";
        }
    </script>

</body>

</html>