Скачать или смотреть Transform Your JavaScript Objects: Moving Field Names with Underscores to Nested Properties

Learn how to easily move field names in your JavaScript objects that contain underscores into nested properties using vanilla JS.
---
This video is based on the question https://stackoverflow.com/q/73521203/ asked by the user 'TenX' ( https://stackoverflow.com/u/19865530/ ) and on the answer https://stackoverflow.com/a/73528783/ provided by the user 'mani' ( https://stackoverflow.com/u/2303348/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Move field names in object containing _ (underscore) to as a nested property after splitting the field name by _

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Transform Your JavaScript Objects: Moving Field Names with Underscores to Nested Properties

As developers, we often encounter situations where we need to restructure our JSON objects for better organization or usability. A common problem arises when we have object keys that contain underscores, which we often want to convert into a nested structure. For instance, consider the following object:

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

The goal is to transform it into a more nested format where keys are categorized in a meaningful way. The desired output would look like this:

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

This guide will explain how to achieve this transformation using vanilla JavaScript—no external libraries like lodash or underscore.js required.

Understanding the Solution

The solution involves breaking down the process into a few simple steps:

If the key contains underscores: Split the key by the underscore character.

Use reduce to build the nested structure: As we split up the key, we need to manage creating objects at each nested level.

Assign the final value: Lastly, assign the value to the appropriate nested key.

Step-by-step Breakdown

Here's a thorough breakdown of the code that implements this solution:

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

Code Explanation

Object.entries(data): This function converts the object into an array of key-value pairs, allowing us to iterate over them easily.

reduce: This array method accumulates results. We're creating a new object based on the structure we define.

splitKey.pop(): This command takes the last segment of the split key (after _) which will be the direct property name within the nested structure.

reduce for nesting: The inner reduce function helps us traverse or create nested objects based on the previous segments of the split key.

Output the Result

Finally, console.log helps us visualize the newly structured object in a clear format.

Conclusion

Restructuring your JavaScript objects for clarity is not just a matter of aesthetics but can greatly improve maintainability and readability of your code. By employing the above method, you can easily reorganize your object fields containing underscores into a clean, nested property structure.

Whether you're processing API responses or formatting data for specific conditions, this approach can be invaluable. Happy coding!