How to Sleep in node.js?

In Node.js, there is no built-in sleep function like in some other programming languages. However, you can use the setTimeout function to simulate a sleep-like behavior. Here's a simple example:

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

async function example() {
  console.log('Start');

  // Sleep for 3 seconds
  await sleep(3000);

  console.log('End');
}

example();

In this example:

1. The sleep function returns a Promise that resolves after a specified number of milliseconds.
2. The example function is an asynchronous function that uses await to pause execution for the specified duration.
3. The example function sleeps for 3 seconds (3000 milliseconds) between the "Start" and "End" log statements.

This approach is non-blocking and works well with the asynchronous nature of Node.js. If you need a synchronous sleep in a specific context, you may need to reconsider your design to leverage asynchronous patterns, as synchronous sleep can block the event loop and negatively impact the performance of your application.

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