如何使用缩进优化 JavaScript 代码以获取路径层级？

const lines = str.split(" ")     .map(line => ({         level: ~~((line.length - line.trimStart().length) / 4),         value: line.trim()     }));  lines.reduce((level, it) => {     if (it.level - level > 1) {         it.level = level + 1;     }     return it.level; }, 0);  const path = []; const result = []; for (const it of lines) {     const { level, value } = it;     path[level] = value;     result.push(path.slice(0, level + 1).join("/")); }  console.log(JSON.stringify(result, null, 4));