Скачать или смотреть How to Efficiently Extract and Combine Text Child Nodes in JavaScript

Learn the fastest and cleanest way to extract and combine text child nodes from a parent element in JavaScript using `.textContent` and other methods.
---
This video is based on the question https://stackoverflow.com/q/65454135/ asked by the user 'Tristan Tran' ( https://stackoverflow.com/u/10765455/ ) and on the answer https://stackoverflow.com/a/65454145/ provided by the user 'CertainPerformance' ( https://stackoverflow.com/u/9515207/ ) 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: Extract and combine all text child nodes

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.
---
How to Efficiently Extract and Combine Text Child Nodes in JavaScript

When working with the Document Object Model (DOM) in JavaScript, one common task is extracting and combining text child nodes that have been dynamically added to a parent element. Suppose you have nodes created by appending text child nodes, and you'd like to quickly retrieve the full text content.

In this post, we will explore how to achieve this efficiently and clearly.

The Problem

Let's consider a scenario where you have a div container that holds multiple text nodes. You've added a series of text nodes to this container using JavaScript, as shown in the snippet below:

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

With the following JavaScript code, you dynamically add five 'a' text nodes:

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

Now, you want to extract the full text content from the container, which in this case would result in the string aaaaa. You might wonder if there's a quicker or cleaner way to gather this text compared to manually looping through each child node.

The Solution

The good news is that there is a much simpler solution: using the .textContent property of the parent node. This property automatically combines all text child nodes into a single string. Let’s break down the solution:

Using .textContent

To get the complete text content of your container with minimal code, simply use the following line:

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

This approach is straightforward:

No Loop Required: You do not need to individually loop through each child node.

Efficiency: It’s optimized for performance compared to manual concatenation methods.

Alternative Method: Using .innerHTML

While .textContent is the best choice for extracting text, you can also use the .innerHTML property if you need to build HTML content:

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

However, since your goal is simply to combine text nodes, .textContent is the more suitable and cleaner option.

Conclusion

By utilizing JavaScript’s .textContent property, you can efficiently extract and combine text child nodes from a parent element without unnecessary complexity. This not only makes your code cleaner but also enhances performance, especially in scenarios involving a large number of text nodes or complex DOM structures.

Feel free to implement this method in your next JavaScript project and enjoy a smoother coding experience!