simple-browser-testing/index.html at master · arve0/simple-browser-testing · GitHub

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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Browser testing with puppeteer</title>
    <!-- avoid 404 for favicon.ico -->
    <link rel="icon" href="data:;base64,iVBORw0KGgo=">
</head>
<body>
    <div id="content"></div>
    <p id="output"></p>

    <script>
        function updateParagraphTextContent(event) {
            document.querySelector('#output').innerHTML = event.target.value;
        }

        const updateFunction = {
            regular: 'updateParagraphTextContent(event)',
            shadowed: 'updateParagraphTextContent(event)',
            iframe: 'parent.updateParagraphTextContent(event)',
        }
        const content = (type) => `
            <label>
                ${type}
                <input onkeyup=${updateFunction[type]}>
            </label>
        `;

        class ShadowedInput extends HTMLElement {
            constructor() {
                super();
                this.attachShadow({ mode: "open" });
            }
            connectedCallback() {
                this.shadowRoot.innerHTML = content('shadowed');
            }
        }
        window.customElements.define("shadowed-input", ShadowedInput);

        document.querySelector('#content').innerHTML = content('regular');
        document.querySelector('#content').innerHTML += `<shadowed-input></shadowed-input>`;
        document.querySelector('#content').innerHTML += `<iframe srcdoc="${content('iframe')}"></iframe>`;

        document.querySelector('iframe').updateParagraphTextContent = updateParagraphTextContent;
    </script>

</body>
</html>