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Editing: wp-tooltip.js

/**
 * @output wp-admin/js/wp-tooltip.js
 */

/**
 * Add focus and hover support for the 'tooltip' type in `wp_tooltip()`.
 * This script can be made obsolete when support is available for Interest Invokers.
 */
(() => {

const supportsPopover = /** @type {boolean} */ ( Object.prototype.hasOwnProperty.call( HTMLElement.prototype, 'popover' ) );
	let hidePopover = false;
	if ( ! supportsPopover ) {
		hidePopover = true;
	}

const popovers = /** @type {NodeListOf<HTMLSpanElement>} */ ( document.querySelectorAll( '.wp-is-tooltip' ) );

popovers.forEach( function( popover ) {
		const trigger = /** @type {HTMLButtonElement|HTMLAnchorElement|null} */ ( popover.querySelector( '.wp-tooltip__toggle' ) );
		const panel   = /** @type {HTMLSpanElement|null} */ ( popover.querySelector( 'span.wp-tooltip__bubble' ) );
		if ( hidePopover && panel ) {
			panel.classList.add( 'hidden' );

return;
		}
		if ( ! trigger || ! panel ) {
			return;
		}

/** @type {ReturnType<typeof setTimeout>} */
		let openTimeout;

// Show Tooltip Function (with delay to prevent flickering).
		const showTooltip = () => {
			clearTimeout( openTimeout );
			openTimeout = setTimeout( () => {
				// Only show if it's not already open.
				if ( ! panel.matches( ':popover-open' ) ) {
					// pass the triggering element so implicit position anchors work.
					panel.showPopover( { source: trigger } );
				}
			}, 300 );
		};
		// Hide Tooltip Function.
		const hideTooltip = () => {
			clearTimeout( openTimeout );
			if ( panel.matches( ':popover-open' ) ) {
				panel.hidePopover();
			}
		};

// Bind Hover and Focus Events.
		trigger.addEventListener( 'mouseenter', showTooltip );
		trigger.addEventListener( 'focus', showTooltip );

trigger.addEventListener( 'mouseleave', hideTooltip );
		trigger.addEventListener( 'blur', hideTooltip );
	});
})();

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