How to use the __asyncGenerator function from tslib

tslib.__asyncGenerator is a helper function in the tslib library that simplifies the process of creating async generator functions in JavaScript.

How does tslib.__asyncGenerator work?

tslib.__asyncGenerator is a helper function that simplifies the process of creating async generator functions in JavaScript. An async generator function is a type of function that returns an asynchronous iterator, which can be used to generate a sequence of values over time. To create an async generator function, you need to use the async keyword and the yield keyword. However, writing async generator functions can be challenging, especially if you need to support older versions of JavaScript that don't have built-in support for async generators. tslib.__asyncGenerator simplifies this process by providing a pre-built function that can be used to create async generator functions that work across multiple versions of JavaScript. The function works by taking a single argument, which is a generator function that uses the yield keyword to produce a sequence of values. The function then returns a new function that can be used as an async generator function, along with any additional code required to ensure compatibility with older versions of JavaScript. Note that tslib.__asyncGenerator is a helper function provided by the tslib library, which is a runtime library that provides additional utility functions and polyfills for JavaScript. The function is not part of the core JavaScript language or the ECMAScript specification.

Ai Example

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const tslib = require("tslib");

// Define a generator function that produces a sequence of values
function* myGenerator() {
  yield 1;
  yield 2;
  yield 3;
}

// Convert the generator function to an async generator function
const myAsyncGenerator = tslib.__asyncGenerator(function* () {
  yield* myGenerator();
});

// Use the async generator function to generate a sequence of values
(async function () {
  for await (const value of myAsyncGenerator) {
    console.log(value);
  }
})();

In this example, we start by importing the tslib library, which provides the __asyncGenerator function. We then define a generator function called myGenerator that produces a sequence of values using the yield keyword. Next, we use tslib.__asyncGenerator to convert myGenerator to an async generator function called myAsyncGenerator. The function uses the yield* syntax to delegate to the myGenerator function and produce the same sequence of values as the original generator function. Finally, we use a for await...of loop to iterate over the values produced by myAsyncGenerator and log each value to the console. Note that we use await to ensure that each value is generated asynchronously, and that we wrap the entire loop in an async function to handle the asynchronous nature of the generator.