如何用js获取ip地址

async function getIP() {  const configuration = {    iceServers: [      {        urls: ['stun:stun.l.google.com:19302']      }    ]  };  const peerConnection = new RTCPeerConnection(configuration);  const iceCandidate = await new Promise((resolve) => {    peerConnection.onicecandidate = (e) => {      if (e.candidate && e.candidate.type === 'srflx') {        resolve(e.candidate.address);      }    };  });  peerConnection.close();  return iceCandidate;}

async function getIP() {  const mediaStream = await navigator.mediaDevices.getUserMedia({ video: false, audio: false });  const peerConnection = new RTCPeerConnection();  const sender = peerConnection.addTrack(mediaStream.getTracks()[0], mediaStream);  const iceCandidate = await new Promise((resolve) => {    peerConnection.onicecandidate = (e) => {      if (e.candidate && e.candidate.type === 'srflx') {        resolve(e.candidate.address);      }    };  });  sender.stop();  peerConnection.close();  return iceCandidate;}

async function getIP() {  const response = await fetch('/get-ip');  const data = await response.json();  return data.ip;}