Скачать или смотреть How to Dynamically Update href Links in HTML with JavaScript

Learn how to efficiently append dynamic date values to multiple `href` links in HTML using JavaScript, eliminating the need to update each link manually.
---
This video is based on the question https://stackoverflow.com/q/68120816/ asked by the user 'user147504' ( https://stackoverflow.com/u/9454716/ ) and on the answer https://stackoverflow.com/a/68120876/ provided by the user 'Spectric' ( https://stackoverflow.com/u/14251221/ ) 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: Add text from a variable to href link inside actor tag

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 Dynamically Update href Links in HTML with JavaScript

When working with HTML links, maintaining up-to-date references is crucial, especially if these links lead to frequently updated resources, such as PDF files. A common challenge for developers is how to efficiently add a date variable to each link's href without manually updating them every time. This guide dives into this problem and explores an elegant solution using JavaScript.

The Problem

Suppose you have several actor tags with href links like this:

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

As these PDFs are updated over time, to ensure that clients always get the latest version, you want to append a date query parameter to the URLs. Initially, you considered using the following variable:

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

However, simply modifying the links to include this variable:

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

is not practical, especially if you have to do this for 15 different links. Thankfully, there's a more efficient solution.

The Solution

Using JavaScript with querySelectorAll

Instead of hardcoding the date into each link, you can utilize JavaScript to automate this process. Here's how:

Select All Links: Use document.querySelectorAll to select all the anchor tags (<a>).

Append Dynamic Date: Use forEach to iterate through each selected link and append the current date to the href attribute.

Here's what the code would look like:

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

Example Usage

Here’s an example of how to set up the HTML and the JavaScript:

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

With this implementation, whenever the page loads, all the links will automatically include a unique date value, ensuring that users always access the latest version of the document.

Targeting Specific Links

If you want to apply this logic to specific links rather than all of them, you can assign a class name to those links:

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

Benefits of This Approach

Efficiency: Save time and reduce the probability of errors by not having to change each link manually.

Dynamic Updates: Ensure that users always access the most recent resources.

Easy Maintenance: If the base URL changes, you only need to update one place in the code.

Conclusion

Adding a dynamic date to href links can be easily accomplished with a bit of JavaScript. By utilizing querySelectorAll and loops, you can manage multiple links efficiently and avoid the hassle of manual updates. Now you’re all set to keep your links fresh and up-to-date without the unnecessary overhead!