jq获取本地网络ipv4地址（与网络属性中相同）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<script src="js/jquery-3.4."></script>
<script type="text/javascript">
function local_ip(){
var mytimeout;
if ( window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection ){
mytimeout = setTimeout(function(){$("#list").html("Local IP address is not supported in this browser");},3000);
window.RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var pc = new RTCPeerConnection({iceServers:[]}), $noop = function(){};
pc.createDataChannel("");
pc.createOffer(pc.setLocalDescription.bind(pc), $noop);
pc.onicecandidate = function(ice){
clearTimeout(mytimeout);
if(!ice || !ice.candidate || !ice.candidate.candidate) return;
var ip = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/.exec(ice.candidate.candidate)[1];
pc.onicecandidate = $noop;
$("#list").html(ip);
};
}
else{
$("#list").html("未获取到");
}
}
local_ip();
</script>
<body>
IP :<div id=list></div>
</body>
</html>