javascript-playground/localStorage.html at main · sol3uk/javascript-playground · GitHub

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<!DOCTYPE html>
<html lang="en" class="h-100">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous" />
    <link href="./prism.css" rel="stylesheet" />
    <title>Local Storage Test</title>
</head>

<body class="d-flex flex-column h-100">
    <nav class="navbar navbar-expand-sm navbar-dark bg-dark">
        <div class="container-fluid">
            <a class="navbar-brand" href="./index.html">JS Playground</a>
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavDropdown"
                aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarNavDropdown">
                <ul class="navbar-nav">
                    <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button"
                            data-bs-toggle="dropdown" aria-expanded="false">
                            Sandboxes
                        </a>
                        <ul class="dropdown-menu dropdown-menu-dark" aria-labelledby="navbarDropdownMenuLink">
                            <li><a class="dropdown-item active" href="./localStorage.html">Local Storage</a></li>
                            <li><a class="dropdown-item" href="./openWeatherAPI.html">APIs</a></li>
                            <li><a class="dropdown-item" href="./stylesTest.html">Styling</a></li>
                        </ul>
                    </li>
                </ul>
            </div>
        </div>
    </nav>
    <div class="container mt-4">
        <h3>Local Storage </h3>
        <h5>Example:</h5>
        <p>
            <button class="btn btn-primary" onclick="clickCounter()" type="button">
                Click me!
            </button>
        </p>
        <div id="counterResult"></div>
        <p>Click the button to see the counter increase.</p>
        <p>
            Close the browser tab (or window), and try again, and the counter will
            continue to count (it is not reset).
        </p>
        <p>
            <button class="btn btn-primary" onclick="seeStorage()" type="button">
                What's in storage?
            </button>
        </p>
        <p>
            When inserting into local storage, we should always stringify data before saving it!
        </p>
        <pre class="rounded-3"><code id="badStorageResult" class="language-plain" ></code></pre>
        <pre class="rounded-3"><code id="goodStorageResult" class="language-plain" ></code></pre>

        <h3>Code Used: </h3>
        <pre class="rounded-3"><code id="codeDisplay" class="language-javascript" ></code></pre>
    </div>

    <footer class="footer mt-auto py-3">
        <div class="container text-center">
            <span class="text-muted">By <a href="https://sol3.me">@sol3uk</a>.</span>
        </div>
    </footer>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"
        integrity="sha512-bLT0Qm9VnAYZDflyKcBaQ2gg0hSYNQrJ8RilYldYQ1FxQYoCLtUjuuRuZo+fjqhx/qtq/1itJ0C2ejDxltZVFg=="
        crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
        crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.24.1/components/prism-core.min.js"></script>
    <script
        src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.24.1/plugins/autoloader/prism-autoloader.min.js"></script>


    <script id="codeForPage">
        var objectTest;
        function clickCounter() {
            if (typeof (Storage) !== "undefined") {
                if (localStorage.clickcount) {
                    localStorage.clickcount = Number(localStorage.clickcount) + 1;
                } else {
                    localStorage.clickcount = 1;
                }
                document.getElementById("counterResult").innerHTML = `You have clicked the button ${localStorage.clickcount} time(s).`;
            } else {
                document.getElementById("counterResult").innerHTML = "Sorry, your browser does not support web storage...";
            }
        }

        function seeStorage() {

            objectTest = {
                hello: "world",
            };

            //Bad - Not stringified.
            localStorage.objectTest = objectTest;

            //Good - Stringified before insertion.
            localStorage.stringifiedObjectTest = JSON.stringify(objectTest);

            document.getElementById("badStorageResult").innerHTML = `Inserted Directly: ${localStorage.objectTest}`;
            document.getElementById("goodStorageResult").innerHTML = `Stringified Before: ${localStorage.stringifiedObjectTest}`;
        }

    </script>
    <script>
        $('#codeDisplay').html($('#codeForPage').html())
    </script>
</body>

</html>