Скачать или смотреть Toggle the display of All Classes with JavaScript

Discover how to effectively toggle the display of all classes using JavaScript in your HTML. Improve user interaction and visibility on your web pages with our simple guide.
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This video is based on the question https://stackoverflow.com/q/65463055/ asked by the user 'suverenia' ( https://stackoverflow.com/u/14559984/ ) and on the answer https://stackoverflow.com/a/65463116/ provided by the user 'sourav satyam' ( https://stackoverflow.com/u/11834630/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

In the world of web development, one common requirement is to toggle the visibility of elements on the page when a button is clicked. This can enhance user interaction, making your web pages more dynamic and user-friendly. In this guide, we'll address a specific problem: how to change the display of all elements with a particular class to either hidden or visible.

The Problem

You may want a button that, when clicked, hides or shows all elements with a specific class. For instance, if you have several elements marked with the class name inactive, you'll want them to toggle from display: block to display: none.

Let's take a look at the initial markup provided:

HTML Structure

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CSS Setup

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The Solution

The task is to ensure each element identified by the inactive class toggles its display status. Unfortunately, there was a mistake in the initial function: it was trying to access style properties directly on a collection rather than individual elements.

Step-by-Step Breakdown

Selecting the Elements: Instead of using document.getElementsByClassName, which returns an HTMLCollection, you should use document.querySelectorAll for a more versatile approach. However, we shall demonstrate the fix using getElementsByClassName since that's what was in the original example.

Looping Through Elements: You must iterate over the collection of elements. For each element, you check its current display style and change it accordingly.

Updated JavaScript Function

Here’s how you can correctly implement the function:

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Final Example

Here’s the complete markup incorporating the updated function:

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

Conclusion

By using the corrected JavaScript function, you can now effectively toggle the visibility of any elements with a class name of inactive. This approach not only enhances the interactivity of your web page but also improves user engagement. Happy coding!