const spreadPaths = require("spread-paths");
 
 
spreadPaths("a.b, c.d.e"); //"a.b,c.d.e"
 
spreadPaths("a.b[c,e]"); //"a.b.c,a.b.e"
 
spreadPaths("a.b[c,e[f,g]]"); //"a.b.c,a.b.e.f,a.b.e.g"
 

 
spreadPaths({});//报错：必须是字符串
spreadPaths("a[b]]");//报错：方括号未闭合
spreadPaths("a[b,c]e");//报错：不支持分支后再合并写法