Can I Programmatically Trigger an HTML `` Dropdown's Options Display?

Triggering HTML SELECT Dropdown Programmatically

Question: Is it possible to programmatically display the options of an HTML element, similar to the behavior triggered by mouseover?

Answer: While this functionality was once possible in Chrome using the combination of document.createEvent() and .dispatchEvent(), it has since been deprecated.

Explanation:

According to the HTML5 Working Draft, Interactive Content elements, such as

, have a defined activation behavior that typically involves clicking. However, the standard also states that triggering an element through means other than clicking should initiate synthetic click activation steps.

Based on this specification, it was once believed that exposing an element programmatically might be possible. Unfortunately, this functionality is no longer supported.

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