fetch is not defined express

To resolve the issue of "fetch is not defined" in Express, you can follow these steps:

Import the fetch module: In order to use the fetch function in Express, you need to import the module that provides it. Typically, this module is called node-fetch. To import it, you can use the following code:

const fetch = require('node-fetch');

Install the node-fetch module: If you haven't already installed the node-fetch module, you need to do so. You can use npm (Node Package Manager) to install it by running the following command in your terminal or command prompt:

npm install node-fetch

This will download and install the node-fetch module in your project's node_modules folder.

Use the fetch function: Once you have imported the fetch module and installed the node-fetch package, you can use the fetch function in your Express code. Here's an example of how you can use it to make a GET request:

app.get('/example', (req, res) => {
  fetch('https://api.example.com/data')
    .then(response => response.json())
    .then(data => {
      // do something with the data
      res.send(data);
    })
    .catch(error => {
      // handle any errors
      res.status(500).send('Error');
    });
});

In this example, the fetch function is used to make a GET request to the https://api.example.com/data endpoint. The response is then converted to JSON format using the json method, and the resulting data is sent as the response to the client.

By following these steps, you should be able to resolve the issue of "fetch is not defined" in Express.