TypeScript class using Mixins causing unexpected property behavior in derived classes
I'm a bit lost with I'm a bit lost with I'm working through a tutorial and I'm working on a project and hit a roadblock... Hey everyone, I'm running into an issue that's driving me crazy. I'm currently implementing a mixin pattern in TypeScript for a project that requires shared functionality across several classes. However, I'm encountering an issue where properties from the mixin are not behaving as expected in derived classes. I've defined a base class and a mixin like this: ```typescript interface MixinA { propertyA: string; } const MixinA = <T extends new (...args: any[]) => {}>(Base: T) => { return class extends Base implements MixinA { propertyA: string = 'default'; methodA() { console.log(this.propertyA); } }; }; class BaseClass {} class DerivedClass extends MixinA(BaseClass) { constructor() { super(); this.propertyA = 'changed'; // Expecting this to be 'changed' } } const instance = new DerivedClass(); instance.methodA(); // Logs 'default' instead of 'changed' ``` I expected `methodA()` to log 'changed' since I set `propertyA` in the constructor of `DerivedClass`, but it still logs 'default'. I've checked the instance of `DerivedClass`, and `propertyA` seems to be correctly set when I inspect it using `console.log(instance)`, showing `propertyA: 'changed'`. However, within the mixin's method, it still references the default value from the mixin. I suspect this might be an issue with how TypeScript handles property inheritance in mixins. I even tried using the `super` method within `DerivedClass` to call the mixin's constructor, but it didn't change the behavior. Am I missing something in how properties are being inherited or initialized with mixins in TypeScript? I'm using TypeScript version 4.5.2. Any help would be appreciated! Has anyone else encountered this? My development environment is Linux. Any ideas what could be causing this? I'm using Typescript latest in this project. Thanks for any help you can provide! My team is using Typescript for this desktop app. Am I missing something obvious?