Flutter – Union type for primitive types data in dart
How can I define a variable with only two possible primitive types, such as (String or num) for example, in Dart? Is there a way to do this? like union types in TypeScript. const x:string|number;
Javascript – JS has object wrappers to let me check primitive's "property" exists or not, how do I let TS work like that?
The return value of XMLValidator.validate is either true or ValidationError (which is not exactly correct, check my update), which has err property. validate( xmlData: string, options?: validationOptionsOptional): true | ValidationError Because javascript uses object wrappers for boolean primitive I can…