Next.js - Error: only absolute urls are supported

Question

I\'m using express as my custom server for next.js. Everything is fine, when I click the products to the list of products

Step 1: I click the produc

Answer 1

In the NextJS 9.5, we can also use process.cwd().
process.cwd() will give you the directory where Next.js is being executed.

import path from 'path'
import fs from "fs";

export const getStaticProps: GetStaticProps = async () => {
    const dataFilePath = path.join(process.cwd(), "jsonFiles", "data.json");
    console.log(dataFilePath);     // will be YourProject/jsonFiles/data.json

    const fileContents = fs.readFileSync(dataFilePath, "utf8");
    const data: TypeOfData[] = JSON.parse(fileContents);
    return { props: { data } };
};

Ref: https://nextjs.org/docs/basic-features/data-fetching#reading-files-use-processcwd