convert-rem-to-px.js

const fs = require("fs");
const path = require("path");

function fixFile(filepath) {
  
  const contents = fs.readFileSync(filepath, "utf-8");
  const matcher = /([0-9]+(?:\.[0-9]+)?)rem/igm;

  const result = contents.replaceAll(matcher, (substr, size) => {
    const rem = Number(size);
    const px = Math.round(rem * 16);
    console.log(substr, "->", size, "->", px);
    return px + "px";
  });

  fs.writeFileSync(filepath, result);

}

function fixFolder(folder) {
  const files = fs.readdirSync(folder);
  for (const file of files) {
    if (file === "node_modules") {
      continue;
    }
    const abspath = path.join(folder, file);
    if (file.endsWith(".scss") || file.endsWith(".vue")) {
      fixFile(abspath);
    } else if (fs.lstatSync(abspath).isDirectory()) {
      fixFolder(abspath);
    }
  }
}

fixFolder(".");