option.columns.function.js

import assert from 'node:assert';
import { parse } from 'csv-parse';

parse(`
"key_1","key_2"
"value 1","value 2"
`.trim(), {
  columns: header =>
    header.map(column => column.toUpperCase())
}, function(err, records){
  assert.deepStrictEqual(
    records, [{
      KEY_1: 'value 1',
      KEY_2: 'value 2'
    }]
  );
});