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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Fill Mask - Hugging Face Transformers.js</title>

    <script type="module">
        // Import the library
        import { pipeline } from 'https://cdn.jsdelivr.net/npm/@xenova/[email protected]';

        // Make it available globally
        window.pipeline = pipeline;
    </script>

    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">

    <link rel="stylesheet" href="css/styles.css">
</head>

<body>
    <div class="container-main">
        <!-- Page Header -->
        <div class="header">
            <div class="header-logo">
                <img src="images/logo.png" alt="logo">
            </div>
            <div class="header-main-text">
                <h1>Hugging Face Transformers.js</h1>
            </div>
            <div class="header-sub-text">
                <h3>Free AI Models for JavaScript Web Development</h3>
            </div>
        </div>
        <hr> <!-- Separator -->

        <!-- Back to Home button -->
        <div class="row mt-5">
            <div class="col-md-12 text-center">
                <a href="index.html" class="btn btn-outline-secondary"
                    style="color: #3c650b; border-color: #3c650b;">Back to Main Page</a>
            </div>
        </div>

        <!-- Content -->
        <div class="container mt-5">
            <!-- Centered Titles -->
            <div class="text-center">
                <h2>Natural Language Processing</h2>
                <h4>Fill Mask</h4>
            </div>

            <!-- Actual Content of this page -->
            <div id="fill-mask-container" class="container mt-4">
                <h5>Unmask with bert-base-uncased:</h5>
                <div class="d-flex align-items-center">
                    <label for="fillMaskText" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Text with
                        Mask:</label>
                    <input type="text" class="form-control flex-grow-1" id="fillMaskText" value="The goal of life is [MASK]."
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                    <button id="fillMaskButton" class="btn btn-primary" onclick="fillMask()">Unmask</button>
                </div>
                <div class="mt-4">
                    <h4>Output:</h4>
                    <pre id="outputArea"></pre>
                </div>
            </div>

            <hr> <!-- Line Separator -->

            <div id="fill-mask-container2" class="container mt-4">
                <h5>Unmask with bert-base-cased (Return Top Result):</h5>
                <div class="d-flex align-items-center">
                    <label for="fillMaskText2" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Text with
                        Mask:</label>
                    <input type="text" class="form-control flex-grow-1" id="fillMaskText2" value="The Milky Way is a [MASK] galaxy"
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                    <button id="fillMaskButton2" class="btn btn-primary" onclick="fillMaskTopResult()">Unmask</button>
                </div>
                <div class="mt-4">
                    <h4>Output:</h4>
                    <pre id="outputArea2"></pre>
                </div>
            </div>
            
            <!-- Back to Home button -->
            <div class="row mt-5">
                <div class="col-md-12 text-center">
                    <a href="index.html" class="btn btn-outline-secondary"
                        style="color: #3c650b; border-color: #3c650b;">Back to Main Page</a>
                </div>
            </div>
        </div>
    </div>

    <script>

        let unmaskeruncased;
        let unmaskerncased;

        // Initialize the sentiment analysis model
        async function initializeModel() {
            unmaskeruncased = await pipeline('fill-mask', 'Xenova/bert-base-uncased');
            unmaskerncased = await pipeline('fill-mask', 'Xenova/bert-base-cased');
        }

        async function fillMask() {
            const textFieldValue = document.getElementById("fillMaskText").value.trim();

            const result = await unmaskeruncased(textFieldValue);

            document.getElementById("outputArea").innerText = JSON.stringify(result, null, 2);
        }

        async function fillMaskTopResult() {
            const textFieldValue = document.getElementById("fillMaskText2").value.trim();

            const result = await unmaskerncased(textFieldValue, { topk: 1 });

            document.getElementById("outputArea2").innerText = JSON.stringify(result, null, 2);
        }

        // Initialize the model after the DOM is completely loaded
        window.addEventListener("DOMContentLoaded", initializeModel);
    </script>
</body>

</html>