getUserMedia-multiple-camera/webcomponent.html at main · DogPo/getUserMedia-multiple-camera · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Multiple Camera Simple Example</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <script type="module">
      import { defineCustomElements } from 'https://cdn.jsdelivr.net/npm/camera-preview-component/dist/esm/loader.js';
      defineCustomElements();
    </script>
    <style>
      camera-preview {
        max-width: 100%;
      }
    </style>
  </head>
  <body>
    <label>
      Camera 1:
      <select id="select-camera-1"></select>
    </label>
    <label>
      Camera 2:
      <select id="select-camera-2"></select>
    </label>
    <camera-preview id="camera1"></camera-preview>
    <camera-preview id="camera2"></camera-preview>
    <button id="btn-open-camera">Open Cameras</button>
    <script>
      var devices;
      var camSelect1 = document.getElementById("select-camera-1");
      var camSelect2 = document.getElementById("select-camera-2");

      window.onload = async function(){
        await listDevices();
      }

      async function listDevices(){
        devices = await document.getElementById("camera1").getAllCameras();
        for (let index = 0; index < devices.length; index++) {
          const device = devices[index];
          camSelect1.appendChild(new Option(device.label ?? "Camera "+index,device.deviceId));
          camSelect2.appendChild(new Option(device.label ?? "Camera "+index,device.deviceId));
        }
        camSelect2.selectedIndex = 1;
      }

      function getComponent(index) {
        return document.getElementById("camera"+(index+1));
      }

      document.getElementById("btn-open-camera").addEventListener("click",function(){
        for (let index = 0; index < 2; index++) {
          var camComponent = document.getElementById("camera"+(index+1));
          const onOpened = async () => {
            var video = await getComponent(index).getVideoElement();
            getComponent(index).style.width = video.videoWidth + "px";
            getComponent(index).style.height = video.videoHeight + "px";
          }
          const onClosed = () => {
            console.log("closed");
          }
          camComponent.addEventListener("opened",onOpened);
          camComponent.addEventListener("closed",onClosed);
          if (index === 0) {
            camComponent.desiredCamera = camSelect1.selectedOptions[0].label;
          }else{
            camComponent.desiredCamera = camSelect2.selectedOptions[0].label;
          }
          camComponent.active = true;
        }
      });
    </script>
  </body>
</html>