file1.json

{
  "name1": "file1"
}

kiabi.js

import { glob, readFile } from "node:fs/promises";
import { resolve } from "node:path";

/**
 *  * watch
 * API Native à base de promises
 * Env
 * Glob - ExperimentalWarning  --disable-warning=ExperimentalWarning NODE_OPTIONS=
 * Typescript --experimental-transform-types --no-experimental-strip-types. import type
 * Test
 */
const folder = resolve(import.meta.dirname, "content");

readFile(resolve(folder, "file1.json"), (err, content) => {
  readFile(resolve(folder, "file2.json"), (err, content2) => {
    readFile(resolve(folder, "file3.json"), (err, content3) => {
      const output = {
        ...JSON.parse(content.toString()),
        ...JSON.parse(content2.toString()),
        ...JSON.parse(content3.toString()),
      };
      console.log(output);
    });
  });
});