webviewer-ext/examples/teachableMachine.html at 6b33ef71ee8e1c2ec41d127dc4c2e34367a38479 · bliu95/webviewer-ext · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>Teachable Machine Image Model</title>
    <style>
        /* Modern, responsive styling */
        body, html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
            background-color: #f4f7f6;
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 100%;
            max-width: 500px;
            padding: 20px;
            box-sizing: border-box;
            height: 100%;
        }
        h1 {
            font-size: 1.4rem;
            color: #333;
            margin-bottom: 20px;
            text-align: center;
        }
        button {
            background-color: #4A90E2;
            color: white;
            border: none;
            border-radius: 12px;
            padding: 16px 32px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: background-color 0.2s, transform 0.1s;
            width: 100%;
            max-width: 300px;
        }
        button:active {
            background-color: #357ABD;
            transform: scale(0.98);
        }
        #webcam-container {
            margin-top: 15px;
            width: 100%;
            display: flex;
            justify-content: center;
        }
        /* Makes the webcam responsive */
        #webcam-container canvas {
            width: 100%;
            max-width: 400px;
            height: auto;
            border-radius: 16px;
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
            background-color: #e0e0e0; /* Placeholder color before load */
        }
        #label-container {
            margin-top: 25px;
            width: 100%;
            max-width: 400px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        /* Clean UI cards for the predictions */
        .label-row {
            display: flex;
            justify-content: space-between;
            background: #ffffff;
            padding: 16px 20px;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
            font-weight: 600;
            color: #444;
            font-size: 1.1rem;
        }
        .probability {
            color: #4A90E2;
        }
    </style>
</head>
<body>

<div class="container">
    <h1>Image Classifier</h1>
    <button type="button" id="start-btn" onclick="init()">Start Camera</button>
    <div id="webcam-container"></div>
    <div id="label-container"></div>
</div>

<script src="https://thunkable.github.io/webviewer-extension/thunkableWebviewerExtension.js" type="text/javascript"></script>
<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest/dist/tf.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@teachablemachine/image@latest/dist/teachablemachine-image.min.js"></script>
<script type="text/javascript">
    let URL = "https://teachablemachine.withgoogle.com/models/9f4pUP5L2/";

    let model, webcam, labelContainer, maxPredictions;

    ThunkableWebviewerExtension.receiveMessage(function(message) {
        if (message.type === 'op-window-direct-response' || message.type === 'op-window-direct-request') {
            return;
        }
        try {
            const msgFromApp = JSON.parse(message);
            if (msgFromApp.type === 'setUrl') {
                URL = msgFromApp.url;
            }
        } catch (e) {
            console.error(e);
        }
    });

    async function init() {
        // Hide the button to free up screen space
        document.getElementById("start-btn").style.display = "none";

        const modelURL = URL + "model.json";
        const metadataURL = URL + "metadata.json";

        model = await tmImage.load(modelURL, metadataURL);
        maxPredictions = model.getTotalClasses();

        const flip = true;
        // We initialize at 200x200, but CSS scales it up smoothly
        webcam = new tmImage.Webcam(200, 200, flip);
        await webcam.setup();
        await webcam.play();
        window.requestAnimationFrame(loop);

        document.getElementById("webcam-container").appendChild(webcam.canvas);
        labelContainer = document.getElementById("label-container");

        // Setup the UI cards for labels
        for (let i = 0; i < maxPredictions; i++) {
            let div = document.createElement("div");
            div.className = "label-row";
            labelContainer.appendChild(div);
        }
    }

    async function loop() {
        webcam.update();
        await predict();
        window.requestAnimationFrame(loop);
    }

    async function predict() {
        const prediction = await model.predict(webcam.canvas);
        const results = {};
        for (let i = 0; i < maxPredictions; i++) {
            const className = prediction[i].className;
            // Convert decimal to a clean percentage (e.g., 0.98 -> 98%)
            const probability = (prediction[i].probability * 100).toFixed(0) + "%";

            labelContainer.childNodes[i].innerHTML = `
                <span>${className}</span>
                <span class="probability">${probability}</span>
            `;
            results[className] = probability;
        }
        ThunkableWebviewerExtension.postMessage(
            JSON.stringify({ type: "prediction", results: results })
        );
    }
</script>

</body>
</html>