create an async generator in javascript

To create an async generator in JavaScript, you can use the async keyword in conjunction with the yield keyword. The async keyword allows you to define an asynchronous function, and the yield keyword allows you to return a value from the async generator function.

Here's an example of how to create an async generator that yields values in a loop:

index.tsx
async function* asyncGenerator() {
  let i = 0;
  while (i < 10) {
    yield new Promise(resolve => {
      setTimeout(() => {
        resolve(i++);
      }, 1000);
    });
  }
};

(async function() {
  for await (const value of asyncGenerator()) {
    console.log(value);
  }
})();
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In this example, the asyncGenerator function is defined as an asynchronous generator, using the async function* syntax. Inside the generator, a loop is used to generate the values, and the yield keyword is used to return each value as a Promise.

To consume the values returned by the async generator, a for await...of loop is used. This will iterate through the generator and wait for each Promise to resolve before moving on to the next value.

Overall, async generators are a powerful tool for iterating over asynchronous data streams in JavaScript.