Error with latex $||^$

[Vast-Stars]

I change default renderer to hexo-render-kramed and then change some render rules in node_modules\kramed\lib\rules\inline.js :

//  escape: /^\\([\\`*{}\[\]()#$+\-.!_>])/,
  escape: /^\\([`*\[\]()#$+\-.!_>])/,

//  em: /^\b_((?:__|[\s\S])+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
  em: /^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,

and I found there is a error when rendering latex code ||x||^2.
Is there any other way except using {||}^2 ?