Скачать или смотреть How to Determine if a contextmenu is Open in JavaScript

Discover effective strategies for managing context menus in JavaScript. Learn how to prevent issues with `mouseout` events when trying to copy code from context menus.
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This video is based on the question https://stackoverflow.com/q/66285475/ asked by the user 'Deanie' ( https://stackoverflow.com/u/3865653/ ) and on the answer https://stackoverflow.com/a/66535347/ provided by the user 'Brebber' ( https://stackoverflow.com/u/9268485/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Contextmenu Problem in JavaScript

When developing interactive web pages, developers often face challenges related to user interactions, such as right-clicking to bring up a context menu. One common scenario arises when we utilize mouse events like mouseover and mouseout for highlighting text (for instance, code in <pre> tags). The issue occurs when the mouseout event unexpectedly triggers as the user interacts with the context menu, removing the highlight just when they want to copy code using right-click.

The Problem

Imagine you've created a page with code snippets wrapped in <pre> tags, and you want to enhance user experience by highlighting these code snippets when users hover over them. You've implemented mouse events to handle the highlighting effectively. However, an unforeseen problem appears:

Upon right-clicking to copy code, the tooltip closes immediately due to the mouseout event triggered as the mouse moves away from the original element to the context menu.

This is particularly frustrating, as the user wants to copy from the context menu, but the highlighting disappears before they get the chance. The question then arises: How can we determine whether a context menu is currently open?

The Lack of a Built-In Solution

Currently, JavaScript provides no direct event or method to determine if a context menu is displayed. This means we cannot easily prevent the mouseout event from executing its action when interacting with a context menu. After extensive research, it appears there isn't a reliable workaround for monitoring the context menu's state through built-in events.

A Custom Solution: Creating Your Own Context Menu

While there is no built-in solution, we can effectively create a custom context menu. This way, we can manage its visibility and related events more efficiently. Below are the steps you can follow to implement this solution.

Steps to Implement a Custom Context Menu

Define Your Custom Context Menu: Create an HTML structure for your context menu. For simplicity, it could just contain a single action like "Copy."

Handle Right-Click Events: Disable the default right-click for your code snippets so the custom context menu can take over.

Manage Menu Visibility: Open the custom context menu upon right-click and ensure it stays open while interacting with it.

Perform Actions from the Menu: When the user clicks on the "Copy" option, execute the copy action and then close the menu.

Close on Outside Clicks: If the user clicks outside the menu, close it gracefully.

Example Code

Here’s a simplified implementation of the above approach:

HTML Structure:

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

JavaScript Logic:

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

Simplified CSS Styles

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

Conclusion

Creating a custom context menu is a great way to avoid the issues associated with the default context menu's interactions with mouse events. By following the steps and sample code presented in this blog, you can enhance user interactions on your web pages, ensuring that text remains highlighted for easy copying. This solution not only resolves the problem but also grants you full control over how your users interact with code snippets.

Remember, while using built-in features is often easiest, just a bit of creativity can provide a smoother experience that meets your specific needs.