Скачать или смотреть How to Automatically Replicate Input Values in HTML Using jQuery

Discover how to easily insert values from one input field into subsequent fields below it using `jQuery`. Simplify your forms with this neat trick!
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This video is based on the question https://stackoverflow.com/q/63009849/ asked by the user 'Lim Han Yang' ( https://stackoverflow.com/u/12646068/ ) and on the answer https://stackoverflow.com/a/63009926/ provided by the user 'Barmar' ( https://stackoverflow.com/u/1491895/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

Have you ever found yourself needing to fill out multiple input fields with the same value? For example, if you want the value entered in one input field to automatically fill in all subsequent fields, it can seem like a tedious task. However, there's a straightforward solution to automate this process using jQuery! In this guide, we'll explore how you can achieve this with a simple script.

The Problem

Imagine you have a set of input fields on a webpage, and you want any value entered in a specific field to be automatically replicated in all the fields below it. For example, if you type 100 into row3, you want row4 and row5 to also show 100. Is it possible to do this seamlessly? Absolutely!

HTML Structure

First, let’s look at the basic HTML structure we're working with:

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

These input fields represent the series of values you would like to manipulate. In our case, they are simply identified by their id attributes from row1 to row5.

Solution using jQuery

Now, let's dive into the solution. We can leverage the jQuery framework to listen for changes in the input fields and automatically populate the fields below with the same value. Here's how to do it:

Required jQuery Script

Firstly, make sure you include the jQuery library in your HTML:

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The jQuery Code

With the library in place, you can write a simple jQuery function to handle the value copying. Here’s the code:

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

How the Code Works

Selector: $("input[id^=row]") selects all input elements whose id starts with row.

Event Listener: .change(function() {...}) sets up an event listener that executes the code inside whenever the value of the input changes.

nextAll Method: $(this).nextAll("input[id^=row]") selects all sibling input fields that follow the current input field (this).

Value Replication: .val($(this).val()) sets the value of all selected input fields to match the current input field's value.

Complete HTML Example

Here’s the full HTML along with the jQuery script:

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

Conclusion

With this simple jQuery solution, entering a value in one input field will automatically populate all subsequent fields below it. This not only saves time but also minimizes the chance of errors while filling out forms. Try implementing this on your own web applications and make your forms more user-friendly!

Feel free to reach out if you have any questions, or let us know how this solution works for you!