build.js

async function build () {
  const fs = require('fs');
  const sass = require('sass');
  const uglify = require('terser');

  const sassOptions = {
    file: process.cwd() + '/src/index.sass',
    indentedSyntax: true,
    outputStyle: 'compressed'
  };
  const sassResult = sass.renderSync(sassOptions);
  const css = String(sassResult.css);

  let findAndReplaceDOMText;
  let findInNw;

  try {
    findAndReplaceDOMText = String(fs.readFileSync('./node_modules/findandreplacedomtext/src/findAndReplaceDOMText.js'));
    findInNw = String(fs.readFileSync('./src/index.js'));
  } catch (error) {
    console.log(error);
  }

  findInNw = findInNw.replace('/* PLACEHOLDER */', css);

  const result = await uglify.minify(findAndReplaceDOMText + findInNw);

  try {
    fs.writeFileSync('./dist/find-in-nw.js', result.code + '\n');
  } catch (error) {
    console.log(error);
  }
}

build();