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Learn how to add an effective `delay` between each recursive call in your JavaScript maze generator to create beautiful animations while visiting each cell.
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This video is based on the question https://stackoverflow.com/q/63704135/ asked by the user 'Britt' ( https://stackoverflow.com/u/14207948/ ) and on the answer https://stackoverflow.com/a/63704305/ provided by the user 'Fong Kin Shing' ( https://stackoverflow.com/u/14208024/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Enhance Your Maze Generator: Adding a Delay Between Recursive Function Calls

Are you developing a maze generator in JavaScript and want to add a dash of animation? You might have encountered a common challenge: how to introduce a delay between each recursive function call within your maze generation logic. This guide will walk you through how to accomplish this effectively, ensuring your maze visits each cell smoothly and sequentially.

Understanding the Problem

You have a maze generation algorithm that relies on a recursive depth-first search. While the function successfully generates the maze by visiting each cell and checking for unvisited neighbors, you want to enhance the visual experience by creating an animation effect. The issue you're facing is that the delay works for the first cell, but on subsequent calls, the animation fails to execute correctly. Instead of pausing between each call, it jumps back to the start of the recursion right away.

The Solution: Adding a Proper Delay

The Key Adjustment

To introduce a delay between recursive calls, you need to ensure that your recursiveDFS function properly awaits each call on the recursive function itself. By adding await in the recursive call, the function will properly wait until the previous call is completed before moving on to the next one.

Code Adjustment

Let’s take a look at the corrected version of your recursiveDFS function:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Adjustments

Awaiting Recursion: By adding await before the recursive call recursiveDFS(next);, you’re instructing JavaScript to pause the execution of the current running function until the awaited Promise is resolved. This ensures that there are no rapid jumps back to the start of the function during the recursion.

Visualization: The addition of a delay creates a visual flow in your maze generation, allowing viewers to see the path being taken as each cell is highlighted.

Maintaining Structure: The rest of your functions for handling grid and cell operations remain unchanged, focusing only on the recursive depth-first search for this enhancement.

Conclusion

Adding a delay between recursive calls in your maze generator not only enhances user experience but also provides a visual understanding of how the algorithm works. Now, when you run your maze generator, it will animate the creation of the maze by visiting each cell with a smooth delay.

Feel free to experiment with different delay durations or even modify the animation to include additional effects, such as varying colors or transition styles, to take your maze generator to the next level. Happy coding!