Excuse me, is this written in What Do You Mean? Or just to show off your skills?

  node.js, question

图片描述

This label statement can be referenced by break or continue statements, and is generally used in conjunction with loop statements such as for statements to return specific positions in the code, mostly in the case of loop nesting! However, overuse will cause debugging trouble! If best practices are used, try to use descriptive tags and do not nest too many loops. You can see the related introduction in elevation 3.