Allow specifying regex for module alias paths

Search Terms

alias regex, import alias regex, regex

Suggestion

Allow specifying path alias using regex with match replacement.

Use Cases

Using path alias when they are automatically generated by custom script in webpack or more fine grained control over path resolution with more complex directories. Current approach does not allow having dynamic alias which consists of 1 or more intermediate path variables.

Examples

Having this path: <projectDir>/modules/Users/resources/js should be resolvable with a regex, e.g.

RegEx: ^#(.+?)\/(.*)$
Resolve: ./modules/$1/resources/js/$2

So that importing from '#Users/manage' would be resolved to modules/Users/resources/js/manage(.ts|.js) etc..

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript / JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. new expression-level syntax)

No source file or test is named. Start by locating TypeScript's existing path-alias and module-resolution handling, then compare it with the regex capture and replacement examples in the issue. Add coverage for resolving '#Users/manage' while preserving current alias behavior.