Author: John Au-Yeung

Web developer specializing in React, Vue, and front end development.

Categories
JavaScript Answers

How to convert string into UTF-8 with Node.js?

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Sometimes, we want to convert string into UTF-8 with Node.js.

In this article, we’ll look at how to convert string into UTF-8 with Node.js.

How to convert string into UTF-8 with Node.js?

To convert string into UTF-8 with Node.js, we call the Buffer.from method.

For instance, we write

const someEncodedString = Buffer.from("foobar", "utf-8").toString();

to call Buffer.from with our buffer string and the string with the encoding of the buffer string.

Then we call toString to return the buffer converted to a string with the "utf-8" encoding.

Conclusion

To convert string into UTF-8 with Node.js, we call the Buffer.from method.

Categories
React Answers

How to fix the ‘Error “Error: A Route is only ever to be used as the child of element Routes” ‘ error with React Router v6?

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Sometimes, we want to fix the ‘Error "Error: A Route is only ever to be used as the child of element Routes" ‘ error with React Router v6.

In this article, we’ll look at how to fix the ‘Error "Error: A Route is only ever to be used as the child of element Routes" ‘ error with React Router v6.

How to fix the ‘Error "Error: A Route is only ever to be used as the child of element Routes" ‘ error with React Router v6?

To fix the ‘Error "Error: A Route is only ever to be used as the child of element Routes" ‘ error with React Router v6, we should put Route components inside the Routes component.

For instance, we write

import { render } from "react-dom";
import { BrowserRouter, Routes, Route } from "react-router-dom";
import App from "./App";
import Expenses from "./routes/expenses";
import Invoices from "./routes/invoices";

const rootElement = document.getElementById("root");
render(
  <BrowserRouter>
    <Routes>
      <Route path="/" element={<App />} />
      <Route path="expenses" element={<Expenses />} />
      <Route path="invoices" element={<Invoices />} />
    </Routes>
  </BrowserRouter>,
  rootElement
);

to wrap Routes around the Route components.

Then we can use React Router normally.

Conclusion

To fix the ‘Error "Error: A Route is only ever to be used as the child of element Routes" ‘ error with React Router v6, we should put Route components inside the Routes component.

Categories
JavaScript Answers

How to fix the “‘nodemon’ is not recognized as an internal or external command, program or batch file.” error in Windows?

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Sometimes, we want to fix the "’nodemon’ is not recognized as an internal or external command, program or batch file." error in Windows.

In this article, we’ll look at how to fix the "’nodemon’ is not recognized as an internal or external command, program or batch file." error in Windows.

How to fix the "’nodemon’ is not recognized as an internal or external command, program or batch file." error in Windows?

To fix the "’nodemon’ is not recognized as an internal or external command, program or batch file." error in Windows, we can install nodemon as a dev dependency in our Node.js project.

To do this, we go to our Node project folder and run

npm install --save-dev nodemon

Then in package.json we add

{
  //...
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "nodemon": "./node_modules/.bin/nodemon"
  }
  //...
}

to add the nodemon script that runs nodemon.

Then we can run the nodemon script by running

npm run nodemon

Conclusion

To fix the "’nodemon’ is not recognized as an internal or external command, program or batch file." error in Windows, we can install nodemon as a dev dependency in our Node.js project.

Categories
JavaScript Answers

How to fix the “‘node’ is not recognized as an internal or external command” error in Windows?

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Sometimes, we want to fix the "’node’ is not recognized as an internal or external command" error in Windows.

In this article, we’ll look at how to fix the "’node’ is not recognized as an internal or external command" error in Windows.

How to fix the "’node’ is not recognized as an internal or external command" error in Windows?

To fix the "’node’ is not recognized as an internal or external command" error in Windows, we can add the Node.js executable path to the PATH environment variable.

To do this, we run

SET PATH=C:\Program Files\Nodejs;%PATH%

to add C:\Program Files\Nodejs directory to the PATH as another entry in the list of values.

Conclusion

To fix the "’node’ is not recognized as an internal or external command" error in Windows, we can add the Node.js executable path to the PATH environment variable.

Categories
JavaScript Answers

How to get the Socket.IO connected user count?

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Sometimes, we want to get the Socket.IO connected user count.

In this article, we’ll look at how to get the Socket.IO connected user count.

How to get the Socket.IO connected user count?

To get the Socket.IO connected user count, we can use the socketIO.engine.clientsCount property.

We can also use

io.sockets.sockets.length

or

Object.keys(io.sockets.connected).length

to get the connected user count.

Conclusion

To get the Socket.IO connected user count, we can use the socketIO.engine.clientsCount property.