Скачать или смотреть How to Pass textbox values in Hyperlinks with JavaScript

Learn how to dynamically pass textbox values in hyperlinks using JavaScript, enhancing user interaction in your web projects.
---
This video is based on the question https://stackoverflow.com/q/68169555/ asked by the user 'Santosh' ( https://stackoverflow.com/u/15751216/ ) and on the answer https://stackoverflow.com/a/68169766/ provided by the user 'Kinglish' ( https://stackoverflow.com/u/1772933/ ) 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: Passing textbox value in href

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.
---
Passing Textbox Values in Hyperlinks: A Step-by-Step Guide

In web development, user interactivity is crucial, especially when it comes to forms and data input. One common scenario is needing to pass the values from textboxes into hyperlinks, particularly for actions like updating a shopping cart item. If you've ever found yourself in a situation where you want to include a textbox value in a hyperlink, then you're in the right place! Today, we will learn how to accomplish this using JavaScript.

The Problem Statement

Suppose you have an online cart interface with items that users can update or remove. Each item has a quantity input field. You want to pass the updated value from this quantity textbox to the URL in the hyperlink that triggers the item update action. This task can initially seem challenging, especially if you are juggling HTML with PHP. Let’s dissect the code given:

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

In the example above, we have marked where the quantity (XXXXXXXXX) needs to be dynamically inserted based on user input. Let's proceed to see how we can integrate JavaScript to address this challenge effectively.

Solution: Using JavaScript to Update Hyperlink

The solution involves adding an event listener to the quantity input box. We will dynamically update the href attribute of the <a> tag whenever the value of the textbox changes. Below are the detailed steps you need to implement:

1. Initial Setup

First, let us set the initial href attribute of the hyperlink to include the quantity value from the PHP code, so that if the quantity is not changed, it will have a valid URL.

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

2. Adding JavaScript to Capture Input Changes

The following JavaScript code listens for input changes on the quantity textbox.

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

Explanation of JavaScript Code

Event Listener for Input Changes: We start by adding an event listener that activates when the webpage is loaded.

Input Element Selection: We select all the quantity inputs (qty1[]) and setup an individual listener for each.

Update Hyperlink Logic:

When the user types in the textbox, we find the closest hyperlink within the same row.

We split the current href using ? to separate the base URL from the parameters.

We utilize URLSearchParams to manage URL parameters easily, updating the quantity with the new textbox value.

Finally, we set the updated URL back into the hyperlink’s href attribute.

3. Complete HTML Structure

To provide context, here’s a simple replicable structure:

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

By implementing this JavaScript solution, you have a functional way to dynamically adjust the hyperlink based on user input.

Conclusion

Enabling dynamic updates in hyperlinks based on textbox inputs significantly enhances the user experience in web applications. With a straightforward JavaScript snippet, you can ensure that your hyperlinks always have the correct data when interacted with. This approach can be adapted to various applications beyond shopping carts, making it a valuable tool in your web development toolkit!

Next time you face a similar problem, utilize this method to pass textbox values seamlessly into hyperlinks.