how to access TypeScript class properties in a Promise chain due to 'this' context loss
I'm wondering if anyone has experience with I tried several approaches but none seem to work. I'm stuck on something that should probably be simple. I'm working on a TypeScript class that makes an API call and processes the response. However, I am working with an scenario where I want to access the class properties `this.data` and `this.url` within a Promise chain. The unexpected behavior seems to stem from the context of `this` being lost inside the `.then()` callback. Here’s a simplified version of my code: ```typescript class ApiClient { private data: any; private url: string; constructor(url: string) { this.url = url; this.data = null; } fetchData() { return fetch(this.url) .then(response => response.json()) .then(data => { this.data = data; console.log(this.data); // This works fine }) .then(() => { this.processData(); // Here I lose `this` context }); } processData() { console.log('Processing data:', this.data); } } const client = new ApiClient('https://api.example.com/data'); client.fetchData(); ``` When I run this code, I get the following behavior: ``` TypeError: want to read property 'data' of undefined ``` It seems that when `processData()` is called, `this` is not referring to the instance of `ApiClient`. I’ve tried using an arrow function for `then`, but I still seem to lose the context in that last chain. Am I missing something, or is there a better way to maintain the context of `this` across Promise chains in TypeScript? Any ideas what could be causing this? For context: I'm using Typescript on Windows. Thanks in advance! I'm working in a Debian environment. I'm open to any suggestions.