A guide on leveraging console.log in Next.js

I'm having trouble displaying the output of an API call using console.log. The issue is that nothing appears in the console (both in the browser and Visual Studio Code). The only console.log that seems to work is within the RouteStatus function, but it shows undefined as a result.

Here's the code snippet:

import RefreshButton from "./refreshButton";
import { getHealthStatus } from "@/lib/health";

export async function getStaticProps() { 
    const health = await getHealthStatus()

    console.log(health) // Issue
    console.log({health}) // Issue
    console.log("test"); // Issue
    return {
      props: {
        health
      },
    };
  }


export default function RouteStatus({ health }) {

    console.log(health) // Works but shows undefined
    console.log({health}) // Works but shows undefined
    console.log("test"); // Works 

    return (
        <>
        </>
    )
}

The getHealthStatus function looks like this:

export async function getHealthStatus() {
    // Fetch data from an external API endpoint
    const res = await 
    fetch('https://example.net:8080/healthcheck')
    if (!res.ok) throw new Error('failed to fetch data')

    console.log(res.json()) // Issue

    return res.json();
  }

Is there a way to make it work properly? I'm attempting to show variables in the console and expect to see the results displayed.

Answer №1

When faced with this issue, I found that identifying the component type is crucial in determining where the console.log output will appear. If it's a server component, you can expect to see it in your development console.

On the other hand, for client components, the output will display in the browser console.

Answer №2

When exploring a Next.js project, keep an eye out for the function getStaticProps(). This special function is designed to run exclusively on the server side, making it essential for handling data fetching and pre-rendering tasks. To witness its operations in action, instead of inspecting the browser's console, direct your attention to the terminal where your app is running.

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