有人可以告诉我正则表达式行中的错误在哪里吗？

Question

I've figured out this pattern:

(?<=module.exports = function routes\(\) {\n)[\S\s]*?(?=\n})

to select the text inside the curly braces in this text:

module.exports = function routes() {
  this.root('pages#main');
  this.get('/dashboard', 'pages#dashboard');
}

Will somebody please teach me why this is invalid?:

myVar = data.match(/(?<=module.exports \= function routes\(\) {\n)[\S\s]*?(?=\n})/);

Answer 1

if toString() works in your context then this should work also

var str = module.exports.toString();
str = str.replace(/function [^ ]+\(\)\s*\{/, '').replace(/\}$/,'');