Optional fields don't include `undefined` in their type.

[justinfagnani]

export class TextField extends HTMLElement {
  size?: 'type'|'large';
}

The type is reported as "type": "\"type\" | \"large\"", but should be "type": "\"type\" | \"large\" | undefined".

[runem]

Is this a problem that you are experiencing when running the CLI or when using the analyzeText function?

Typescript strips undefined and null from the reported type if strictNullChecks is false, and it seems like I forgot to add it to compiler options when calling analyzeText:

https://github.com/runem/web-component-analyzer/blob/d8809c255c5f19b3ba63eafbbec7f0af5791a636/src/analyze/analyze-text.ts#L57-L62

[runem]

Is this still an issue, or did I fix it by adding strictNullChecks to compiler options for analyzeText?