TS2748 Cannot access ambient const enums when the '--isolatedModules' flag is provided #205

I use maxGraph v0.2.1 in a TypeScript application that activates the isolatedModules option.

Accessing to enum declared in constants generates the TS2748 error. For instance, constants.ALIGN.LEFT or constants.SHAPE.ELLIPSE.

My Proposal

maxGraph should probably not export "const enum" for interoperability reasons.

See

• https://ncjamieson.com/dont-export-const-enums/ (found via Ambient const enums are not allowed when the '--isolatedModules' flag is provided OfficeDev/microsoft-teams-library-js#267 (comment))
• Const enums are preserved when using transpileModule microsoft/TypeScript#5243
• https://www.typescriptlang.org/tsconfig#isolatedModules

We could also ban const enums with typescript-eslint.io/linting/troubleshooting#how-can-i-ban-specific-language-feature or if we absolutely must keep const enum, we should enable preserveConstEnums typescriptlang.org/tsconfig#preserveConstEnums

Notes

Be also aware of #378.

Usage of const enum in maxGraph-core prevents to use them in the Storybook TypeScript stories (in the html package) as this project uses the isolatedModules option.