search for string on files and replace with something else using node

script.js

const Finder = require('fs-finder');
const fs = require('fs');
const changeCase = require('change-case');

var files = Finder.from('./components/').findFiles('*.js');

function editFile(filePath) {
  fs.readFile(filePath, 'utf-8', function(err, data) {
    if (err) throw err;

    const oldValues = data.match(/{(this.renderFormGroup)+(.*?)}/g);
    let newValues = []
    let newData = data

    if (oldValues) {
      oldValues.forEach((value) => {
        const temp = value.split("'");
        let newValue = value
        let newId;

        newId = changeCase.paramCase(temp[1]);

        newValue = newValue.replace(temp[1], `id-${newId}`);

        newValues.push(newValue)
      });

      newValues.forEach((value, index) => {
        newData = newData.replace(oldValues[index], value);

        fs.writeFile(filePath, newData, 'utf-8');
      });
    }
  });
}

function loopFiles() {
  files.forEach(editFile)
}

loopFiles();