Axioserror: data after transformation must be a string, an arraybuffer, a buffer, or a stream

When using Axios, if you encounter the “axios error: data after transformation must be a string, an arraybuffer, a buffer, or a stream” error, it means that the response data received from the API cannot be transformed into one of the valid types mentioned in the error message.

Axios allows you to specify a response type (e.g., “arraybuffer”, “blob”, “document”, “json”, “text”, etc.) when making a request. By default, Axios will try to transform the response data into JSON format. However, if the actual response data cannot be transformed into the specified type, this error will be thrown.

Here are a few possible causes for this error, along with examples:

1. The response data is already a string:

   axios.get('/api/data')
     .then(response => {
       // Assuming the response data is already a string
       console.log(response.data);
     })
     .catch(error => {
       console.log(error);
     });

2. The response data is not in a valid format:

   axios.get('/api/data')
     .then(response => {
       // Assuming the response data is an object, not a valid JSON
       console.log(response.data);
     })
     .catch(error => {
       console.log(error);
     });

3. The response data is empty:

   axios.get('/api/data')
     .then(response => {
       // Assuming the response data is empty
       console.log(response.data);
     })
     .catch(error => {
       console.log(error);
     });

To solve this error, you can:

• Ensure that the response data is in the expected format.
• Check if the API is returning the appropriate data.
• Verify the response type specified in the Axios request.