Why Doesn't JavaScript's Mouseover Trigger CSS :hover?

CSS ":hover" in JavaScript: A Synthetic Enigma

The elusive goal of simulating a mouseover event in JavaScript to trigger the CSS ":hover" declaration has proven to be a challenge. Despite successfully capturing the "mouseover" listener, the CSS ":hover" state remains unyielding.

Attempts to Force Hover State

Adding a class to the element within the mouseover listener and toggling its presence on mouseover/mouseout events has been attempted, but to no avail. The hover state simply refuses to engage.

The Root Cause: Untrusted Events

Upon investigation, the root of this issue lies in the inherent nature of mouseover events. According to the HTML standard, mouseover events are considered untrusted, meaning they cannot invoke certain browser actions, including the activation of CSS ":hover" declarations.

A CSS Class Compromise

Therefore, the only viable solution is to manually add a CSS class to the element during mouseover events and remove it on mouseout events. This approach circumvents the restrictions of untrusted events and ensures the desired hover state is achieved.

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