Скачать или смотреть How to Replace Content Inside a Textarea with jQuery

Learn how to easily replace specific content inside a textarea using jQuery with this step-by-step guide.
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This video is based on the question https://stackoverflow.com/q/62370115/ asked by the user 'John Albert Flores' ( https://stackoverflow.com/u/13288021/ ) and on the answer https://stackoverflow.com/a/62370157/ provided by the user 'Nick McCurdy' ( https://stackoverflow.com/u/406249/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Replace Content Inside a Textarea with jQuery

When developing web applications, you may find yourself needing to manipulate user inputs, especially when dealing with text areas. In this post, we’ll explore a common scenario where you want to replace content within a textarea after submission.

The Problem: Replacing Text Inside a Textarea

Imagine you have a web form with a textarea where users can list their favorite devices. The goal is to append a suffix like -VALIDATED to each device entry after the user submits the form. For instance, if the user enters the following devices:

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After processing the submission, you want the list to display as:

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The Solution: Using jQuery to Modify Textarea Content

We can achieve this using jQuery by manipulating the textarea's content on form submission. Below is a breakdown of the solution.

Step 1: Setting Up Your HTML

First, ensure you have your basic HTML structure with a textarea and a form. Here’s how it looks:

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Step 2: Attaching the jQuery Submit Event

Next, we’ll use jQuery to listen for the form submission event. This can be done using the following code:

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Step 3: Processing Textarea Content

Inside the event handler, we will fetch the textarea's content, split it into lines (each device), and append -VALIDATED to each line. Here’s how:

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Full Code Example

Here’s the complete jQuery code needed to make everything work together:

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Conclusion

By following the steps outlined above, you can easily modify the contents of a textarea using jQuery. This technique is extremely useful for web applications where user input needs to be validated or reformatted before being processed or saved.

Feel free to enhance this example further by adding additional validations or user feedback to improve the overall experience!

For further reading, consider exploring jQuery’s documentation and practicing with different DOM manipulation techniques.