只能从启动连接的一端发送数据。如何从另一端（PeerJs）发送数据

我正在使用我的SveltKit应用程序中的peerjs模块创建一个对等文件传输应用程序

此外，自定义信令服务器使用peerjs --port 5000命令，并成功连接

这是我的文件发送者端的代码类型脚本：

    import { FormatFileSize } from '../lib/utils/FormatFileSize';  // function to convert file size into a string of kb, MB, GB file sizes
    import Peer from 'peerjs';
    import type { DataConnection } from 'peerjs'; // had to import separately because no export of DataConnection was shown from the 'peerjs' module I don't know why
    import { onMount } from 'svelte';

    export let file: FileList;  // the file which needs to be transfered

    let senderPeerId: string = '';

    onMount(() => {
        let peer: Peer = new Peer({
            host: '/',
            port: 5000
        });

        peer.on('open', function (id) {
            console.log('My peer ID is: ' + id);
            senderPeerId = id;
        });

        peer.on('connection', (dataConnection: DataConnection) => {
            console.log('connected', dataConnection);

            dataConnection.send('Hello');  // trying to send this but it's not being recie

            dataConnection.on('data', function (data) {
                console.log('Received', data);  // I am logging the data received from the other end
            });
        });
    });

这是我在文件接收方端的代码类型脚本（但这一端正在启动对等连接）：

    import type { PageData } from './$types';
    import Peer from 'peerjs';
    import { onMount } from 'svelte';

    export let data: PageData; // in the formate of { receiverId: string } because this page params contain the peer id of the sender.

    let peer: Peer;  // initiating here so that can use it elsewhere

    onMount(() => {
        peer = new Peer({
            host: '/',
            port: 5000
        });
        peer.on('open', function (id) {
            console.log('My peer ID is: ' + id);
            startPeerConnection();
        });
    });

    function startPeerConnection() {
        const dataConnection = peer.connect(data.receiverId);

        console.log(dataConnection);

        dataConnection.on('open', function () {
            console.log('connection started');

            dataConnection.on('data', function (data) {
                console.log('Received', data);  // logging the data, but no data is recieved
            });

            dataConnection.send('World');  // this data is sent successfully and logged in the console of the other side 
        });
    }

我在这里做错了什么，或者只有发起连接的一方可以发送数据？

我浏览了互联网，但找不到类似的问题和解决方法，请帮助！！