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app.js
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app.js
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'use strict';
const sourcesDiv = document.getElementById('sources');
const thumbSize = {width: 300, height: 300};
function getSources(type) { // eslint-disable-line no-unused-vars
window.desktopCapturer.getSources({types: [type], thumbnailSize: thumbSize}, (err, sources) => {
if (err) {
console.error('desktopCapturer.getSources error', err);
alert(JSON.stringify(err, null, 2)); // eslint-disable-line no-alert
} else {
console.info('desktopCapturer sources', JSON.stringify(sources, null, 2));
sourcesDiv.innerHTML = '';
sources.forEach(dcSource => {
const item = document.createElement('div');
const btn = document.createElement('button');
btn.textContent = `${dcSource.name} (${dcSource.id})`;
btn.addEventListener('click', () => {
setVideo({
audio: false,
video: {
mandatory: {
chromeMediaSource: 'desktop',
chromeMediaSourceId: dcSource.id
}
}
});
});
const img = new Image();
img.src = dcSource.thumbnail.toDataURL();
item.appendChild(btn);
item.appendChild(document.createElement('br'));
item.appendChild(img);
sourcesDiv.appendChild(item);
});
}
});
}
const video = document.getElementById('video');
function setVideo(mediaConstraints) {
stopVideo();
navigator.mediaDevices.getUserMedia(mediaConstraints)
.then(stream => {
video.srcObject = stream;
})
.catch(error => {
console.error('getUserMedia error', error);
alert(JSON.stringify(error, null, 2)); // eslint-disable-line no-alert
});
}
function stopVideo() {
if (video.srcObject) {
video.srcObject.getTracks().forEach(t => {
t.stop();
});
video.srcObject = null;
}
}
function captureScreen() { // eslint-disable-line no-unused-vars
setVideo({
audio: false,
video: {
mandatory: {
chromeMediaSource: 'screen'
}
}
});
}