WordPress fix Reply To: Create a drop-down panel with open/close button in admin toolbar

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Reply To: Create a drop-down panel with open/close button in admin toolbar, by bemdesign

I’d look at using JavaScript to inject your button element inside the DOM where you need it. Then add an event listener to that button to trigger the panel to reveal/hide when the button is toggled. Research JavaScript and DOM manipulation.

Reply To: Create a drop-down panel with open/close button in admin toolbar