traverse to manipulate JSON

modules.js

// yarn list --json > modules.json

const fs = require('fs');

const O = require('./modules.json');

function visit(o) {
  if (typeof o === 'object' && o !== null) {
    if (o instanceof Array) {
      // change array (noop)

      for (const it of o) {
        visit(it);
      }
    } else {
      // change object
      delete o.shadow;
      delete o.color;
      delete o.hint;
      delete o.depth;

      for (const k of Object.keys(o)) {
        visit(o[k]);
      }
    }
  }
}

visit(O);

fs.writeFileSync('modules2.json', JSON.stringify(O.data.trees, null, 2));