postinstall.js

const fs = require("fs");
const nodeVersion = "node 10.8";

// Patch to node_modules/*
const patch = staticPath => {
  let folderNames = fs.readdirSync(staticPath);
  for (let folderName of folderNames) {
    let stats = fs.statSync(staticPath + "/" + folderName);
    if (!stats.isDirectory()) continue;

    try {
      let packageFilePath = `${staticPath}/${folderName}/package.json`;
      let browserListFilePath = `${staticPath}/${folderName}/.browserslistrc`;
      let packageFileData = JSON.parse(fs.readFileSync(packageFilePath));

      delete packageFileData["browserslist"];
      fs.writeFileSync(browserListFilePath, nodeVersion);
      fs.writeFileSync(packageFilePath, JSON.stringify(packageFileData, null, 2));
      console.log(`Fixed browserlist in ${packageFilePath}`);

      // Patch to node_modules/*/node_modules/*
      let nestedModulePath = `${staticPath}/${folderName}/node_modules`;
      if (fs.existsSync(nestedModulePath)) patch(nestedModulePath);
    } catch (e) {}
  }
};

patch("./node_modules");
console.log(`All browserlist has been updated.`);