代码一：

  if (typeof window != 'undefined') {var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;if (RTCPeerConnection)(() => {var rtc = new RTCPeerConnection()rtc.createDataChannel(''); //创建一个可以发送任意数据的数据通道rtc.createOffer(offerDesc => { //创建并存储一个sdp数据rtc.setLocalDescription(offerDesc)}, e => {console.log(e)})rtc.onicecandidate = (evt) => { //监听candidate事件if (evt.candidate) {console.log('evt:', evt.candidate)let ip_rule = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/var ip_addr = ip_rule.exec(evt.candidate.candidate)[1]console.log('ip_addr:', ip_addr) //打印获取的IP地址}}})()else {console.log("没有找到")}}

代码二：

function getLocalIPs(callback) {
var ips = [];var RTCPeerConnection = window.RTCPeerConnection ||window.webkitRTCPeerConnection || window.mozRTCPeerConnection;var pc = new RTCPeerConnection({// Don't specify any stun/turn servers, otherwise you will// also find your public IP addresses.iceServers: []
});
// Add a media line, this is needed to activate candidate gathering.
pc.createDataChannel('');// onicecandidate is triggered whenever a candidate has been found.
pc.onicecandidate = function (e) {if (!e.candidate) { // Candidate gathering completed.pc.close();callback(ips);return;}var ip = /^candidate:.+ (\S+) \d+ typ/.exec(e.candidate.candidate)[1];if (ips.indexOf(ip) == -1) // avoid duplicate entries (tcp/udp)ips.push(ip);
};
pc.createOffer(function (sdp) {pc.setLocalDescription(sdp);
}, function onerror() {});
}

如果获取到的格式为：xxxx-xxxx-xxxx-xxxx.local，则需要改下chrome的设置（默认隐藏了本机ip）
搜索chrome://flags/#enable-webrtc-hide-local-ips-with-mdns
将Anonymize local IPs exposed by WebRTC置为disabled

听说有些版本没有这个设置，那就得再继续找方案了~