转载地址：https://mp.weixin.qq.com/s/ryAF9IXRsaPs01xSHG-AiA
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<button>共享屏幕</button>
<script>
const button = document.querySelector("button");
button.addEventListener("click", async () => {
const stream = await navigator.mediaDevices.getDisplayMedia({
video: true,
});
const mime = MediaRecorder.isTypeSupported("video/webm;codecs=h264")
? "video/webm;codecs=h264"
: "video/webm";
const mediaRecorder = new MediaRecorder(stream, { mimeType: mime });
const chunks = [];
mediaRecorder.addEventListener("dataavailable", function (e) {
chunks.push(e.data);
});
mediaRecorder.addEventListener("stop", () => {
const blob = new Blob(chunks, { type: chunks[0].type });
const url = URL.createObjectURL(blob);
const a = document.createElement("a");
a.href = url;
a.download = "video.mp4";
a.click();
});
mediaRecorder.start();
});
</script>
</body>
</html>