How to to sleep delay in javascript async await promise

to implement a sleep delay in javascript using async/await and promises, you can create a function that returns a promise that resolves after a specified time. this allows you to pause execution within an asynchronous function, simulating a sleep behavior.

when using this approach, you define a function that takes a duration in milliseconds as an argument. inside this function, you utilize the `settimeout` method to create a delay. the promise will resolve after the timeout completes, enabling you to await this promise in your async function.

by employing the `await` keyword, the asynchronous function will pause until the promise is resolved, effectively creating a delay in execution. this technique is particularly useful in scenarios where you need to control the timing of asynchronous operations, such as in animations, api calls, or user interactions, without blocking the main thread.
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