import { parse, Rule } from 'postcss';

const css = parse('a {  one: X  }');
const a = css.first as Rule;
const { start: a_invalid_1, end: a_invalid_2 } = a.rangeBy({});
const a_invalid_3 = a.positionBy({ index: 1 });
const a_invalid_4 = a.positionInside(0);
console.log(a_invalid_1);
console.log(a_invalid_2);
console.log(a_invalid_3);
console.log(a_invalid_4);

const a_valid_1 = a.source?.start;
const a_valid_2 = a.source?.end;
const a_valid_3 = a.positionBy({});
console.log(a_valid_1);
console.log(a_valid_2);
console.log(a_valid_3);