Encountered a problem with regular expressions in Angular 2 - a Module parse error due to an octal literal in strict mode

Greetings, I have encountered an issue with a regular expression in my environment.ts file.

export const environment = {

passwordPolicy: "^(?!.*(.)\1\1)(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}.*$"

};

Unfortunately, when running ng test, I am faced with the following error:

ERROR in ./src/environments/environment.ts
Module parse failed: Octal literal in strict mode (74:30)
You may need an appropriate loader to handle this file type.
|     passwordPolicy: "^(?!.*(.)\1\1)(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}.*$"
| };
| 
 @ ./src/app/shared/services/config.service.ts 22:20-64
 @ ./src/app/shared/services/users.service.ts
 @ ./src/app/shared/services/index.ts
 @ ./src/app/users/users.component.spec.ts
 @ ./src \.spec\.ts$
 @ ./src/test.ts

If anyone has any insights or solutions, your assistance would be greatly appreciated. Thank you.

Answer №1

It is important to remember to properly escape your backslashes in code.

"^(?!.*(.)\\1\\1)(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}.*$"

Failing to double the backslashes can lead to unexpected errors by incorrectly interpreting them as escape characters.

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