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I am trying to set up ws but I am getting this error: "Uncaught ReferenceError: require is not defined" & "Uncaught ReferenceError: Cannot access 'ws' before initialization". I use node.js.This is the code:

const WebSocket = require('ws');

const serverAddress = "ws://127.0.0.1:5000";

const ws = new WebSocket(serverAddress);

function send_data(){
  ws.send(document.getElementById("message-input").value);
}

this is the html code:

<input class="input_color" type="text" id="message-input" value="type-here">
<button><input type="image" src="../../img/icon_send.png"id="send-button" alt="submit" 
class="send_button" onclick="send_data() "></button>
<script type="text/javascript" src="../../client.js">
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  • you meant javascript or nodejs in your tags? If javascript then require() doesn't exist in js. It is a part of Nodejs Commented Jun 28, 2021 at 11:40
  • Are you running it in terminal via node filename.js or just open this file in browser? Commented Jun 28, 2021 at 11:44
  • @ciekals11 i use git bash to run it Commented Jun 28, 2021 at 11:45
  • The first part of code that you posted is in client.js file. Am i correct? Commented Jun 28, 2021 at 11:46
  • @ciekals11 yes. Commented Jun 28, 2021 at 11:47

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You are using nodejs code in the browser. The browser doesn’t know ‘require’, so your code will never work like this.

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