How to locate dynamically disappearing HTML elements during F12 debugging?

F12 debugging tips: Easily locate fleeting HTML elements

In web debugging, dynamic elements (such as menus displayed by hovering over the mouse, and drop-down boxes that disappear after clicking) often disappear during inspection, causing difficulty in positioning. This article provides a way to help you quickly find these elements of “hide and seek”.

Step 1: Open the developer tool and get close to the target element

Press F12 to open the browser developer tools and switch to the Elements panel. Move the scrollbar near the target element, but avoid hovering over it to prevent it from disappearing.

Step 2: The mouse stays in the developer tool

Keep the mouse in the developer tools window. Use the arrow keys on the keyboard or other console commands to navigate to the target element accurately.

Key: Why keep the mouse inside the developer tools?

Keeping the mouse within the developer tool can prevent mouse events on the web page from being triggered, thus preventing the target element from disappearing due to mouse interaction. This allows you to safely check the HTML code of the element without worrying about the element disappearing suddenly.

This technique is especially suitable for debugging complex web interactions, significantly improving debugging efficiency. With this approach, you can effectively locate and inspect those dynamic elements that are easily gone, and easily solve debugging difficulties.

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