create promise class in javascript

To create a Promise class in JavaScript, we can use the built-in Promise class and extend it to create our own class with custom functionalities. A Promise is an object that represents a value that may not be available yet but will be resolved at some point in the future. Here is an example of how to create a Promise class in JavaScript:

index.tsx
class MyPromise extends Promise {
  constructor(executor) {
    super(executor);
  }
  
  // Add custom functions here

  static resolve(value) {
    return new MyPromise(resolve => resolve(value));
  }
}
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In the above example, we extend the built-in Promise class with our custom class MyPromise. We define the constructor function that takes an executor function, which will be called immediately when the Promise is created. The super keyword is used to call the constructor of the parent class. We also define a static method called resolve that creates a new instance of MyPromise with the resolved value.

We can then add any custom methods to the MyPromise class to extend its functionality as needed.