Скачать или смотреть How to Disable a Submit Button After Submission in JavaScript

Discover how to effectively disable a submit button immediately after it's clicked using JavaScript, ensuring better user experience.
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This video is based on the question https://stackoverflow.com/q/64967135/ asked by the user 'agongji' ( https://stackoverflow.com/u/12902027/ ) and on the answer https://stackoverflow.com/a/64967259/ provided by the user 'Harshana' ( https://stackoverflow.com/u/6952359/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Disable a Submit Button After Submission in JavaScript

If you're building a web form that requires a submit button, you might encounter a common scenario: users clicking the button multiple times before the form processes. This can lead to unintended issues such as duplicate submissions. A simple yet effective solution is to disable the submit button immediately after it has been clicked. In this guide, we’ll take a look at how to implement this functionality using JavaScript.

The Problem

When you create a form with a submit button, the default behavior is for the form to submit and the page to reload. If you have an event listener attached to the form's submission event, you might notice that any changes you make during that event (such as disabling the button) won't be visible to the user because the page reloads almost immediately afterward. This can lead to confusion and poor user experience.

Example Code

Here’s a simple HTML structure for our form:

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The Solution

To resolve the issue of the button being re-enabled on page reloads, you can use the evt.preventDefault(); method in your event listener. This prevents the default form submission behavior, allowing you to run your custom JavaScript after the button is clicked. Let's break it down into steps.

Step-by-Step Guide

Select the Form and Button Elements: Use document.getElementById to get references to your form and button elements.

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Add An Event Listener to the Form: Set up an event listener for the form's submit event.

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Prevent Default Submission: Within the event listener, call evt.preventDefault(); to stop the page from reloading.

Disable the Button: After preventing the default behavior, disable the submit button to provide feedback that the form has been submitted.

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Complete Code Example

Here's how the complete JavaScript code looks:

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Final HTML Structure

Make sure your HTML structure remains the same:

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Conclusion

By utilizing the evt.preventDefault() method, you can effectively manage button states and enhance user experience in your web applications. Disabling a submit button right after submission not only prevents duplicate submissions but also informs users that their request is being processed.

In summary, follow these steps and try it out in your projects to improve functionality and usability. Happy coding!