How to add properties to the global variable from the loop when working with asynchronous fs.readFile function?

Question

I get nothing in result object, because it's executed earlier than readFile.

But anyway, I want to find a way to add all properties to the global object and then add it all into the .json file.

const fs = require('fs');

const PATH = './src/features';

const featureFolders = fs.readdirSync(PATH);

const result = {};

for (const file of featureFolders) {
//   console.log(file);
const allFolders = fs.readdirSync(${PATH}/${file});

for (const componentFile of allFolders) {
fs.readFile(${PATH}/${file}/${componentFile}, 'utf-8', (err, data) =\> {
const myRegex = /someregex/;

      if (myRegex.test(data?.toString())) {
        result[componentFile] = {};
      }
    });

}
}

fs.writeFile('./myJSON.json', JSON.stringify(result), error =\> {
console.log(error);
});

My attempts are described in the code snippet above.