How Can I Implement Delays in JavaScript Loops to Prevent Overlapping Iterations?

Implementing Delays in JavaScript Loops

Problem:

Introducing delays within a JavaScript while loop often results in the loop running too quickly, leading to undesired outcomes. How can we create a loop that includes delays between iterations?

Solution:

The setTimeout() function, while useful for introducing delays, is non-blocking and executes immediately. As a result, multiple setTimeout() calls in a loop will overlap.

Instead, we can utilize a recursive loop pattern to achieve the desired effect. Here's an example:

var i = 1;                    // Set counter to 1

function myLoop() {         // Create loop function
  setTimeout(function() {   // Call 3s setTimeout when loop is called
    console.log('hello');   // Your code here
    i++;                    // Increment counter
    if (i < 10) {           // If counter < 10, call loop function again
      myLoop();             // Trigger another setTimeout()
    }                       
  }, 3000)
}

myLoop();                   // Start the loop

In this approach, the myLoop() function recursively invokes itself within the setTimeout() callback. Each iteration is delayed by 3 seconds, ensuring sequential execution of the loop.

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