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                <html lang="en">
    <meta charset="utf-8">

    <title>Using Ionic without any frameworks</title>

    <link href="" rel="stylesheet" media="screen">
    <script src=""></script>
    <script src=""></script>
    hello = async function () {
        alert('Hello World!');

    // Our custom element
    class MyPopover extends HTMLElement {
        constructor() {

        async connectedCallback() {

            // Here we parse the content of the popover
            this.innerHTML = '<ion-content><ion-button onclick="hello()">Click me</ion-button></ion-content>';

    // We define our custom element
    customElements.define('my-popover', MyPopover);

    // The function to bring the pieces together
    presentMyPopover = async function() {
        // We get the anchor
        const popoverController = document.querySelector('ion-popover-controller');

        await popoverController.componentOnReady();

        // We create the popover for our custom element
        const popover = await popoverController.create({
            component: 'my-popover',
            translucent: true

        // We present the popover
        return await popover.present();


    <ion-content text-center>
        <h1>Popover usage</h1>
        <!-- On click we call the function to open the popover -->
        <ion-button onclick="presentMyPopover()">Open</ion-button>

    <!-- Our popover anchor -->