postmate/iframe.html at main · codeages/postmate · GitHub

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<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>IFrame Page</title>
</head>
<body>
<div id="app">
    <h1>IFrame Page</h1>
    <p>1</p>
    <p>2</p>
    <p>3</p>
    <p>4</p>
    <p>5</p>
    <p>6</p>
    <p>7</p>
    <p>8</p>
    <p>9</p>
    <p>10</p>
    <p>11</p>
    <p>12</p>
    <p>13</p>
    <p>14</p>
    <p>15</p>
</div>
<script type="module">
    import Postmate from "./src/main.js";
    const handshake = new Postmate.Model({
        hello: () => {
            return "I'm iframe page."
        }
    });

    handshake.then(parent => {
        console.log('iframe page handshake completed.');
        const observer = new ResizeObserver(() => {
            parent.emit('resize', document.documentElement.scrollHeight);
        });
        observer.observe(document.body);
    });

    let index = 15;
    setInterval(() => {
        index ++;
        const p = document.createElement('p');
        p.textContent = index;
        document.getElementById('app').appendChild(p);
        console.log("insert p", index);
    }, 5000);
</script>
</body>
</html>