User:Polygnotus/Scripts/SectionLinks.js

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This user script seems to have a documentation page at User:Polygnotus/Scripts/SectionLinks.

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// Add link icons to h2 headers for current versions, old revisions, and diffs
(function() {
    function addLinkIcons() {
        const headers = document.querySelectorAll('h2[id]');
        
        headers.forEach(header => {
            const isCurrentVersion = !window.___location.search.match(/[?&]oldid=(\d+)/) && !document.querySelector('.diff-currentversion-title');
            
            if (isCurrentVersion) {
                // Add two icons for current version
                addIcon(header, '&#128279;', false); // Chain link emoji for section link
                addIcon(header, '&#128204;', true);  // Pushpin emoji for permalink
            } else {
                // Add single icon for old revision or diff
                addIcon(header, '&#128279;', true);
            }
        });
    }

    function addIcon(header, iconText, isPermalink) {
        const icon = document.createElement('span');
        icon.innerHTML = iconText;
        icon.style.cursor = 'pointer';
        icon.style.marginRight = '5px';
        icon.style.fontSize = '0.8em';
        
        icon.addEventListener('click', function(e) {
            e.preventDefault();
            let url;
            
            if (isPermalink) {
                const currentId = mw.config.get('wgRevisionId');
                url = `${window.___location.origin}${window.___location.pathname}?oldid=${currentId}#${header.id}`;
            } else {
                url = `${window.___location.origin}${window.___location.pathname}#${header.id}`;
            }
            
            navigator.clipboard.writeText(url).then(() => {
                mw.notify(`${isPermalink ? 'Permalink' : 'Section link'} copied to clipboard!`, {
                    type: 'success',
                    tag: 'urlCopy'
                });
            }).catch(() => {
                mw.notify('Failed to copy URL', {
                    type: 'error',
                    tag: 'urlCopy'
                });
            });
        });
        
        header.insertBefore(icon, header.firstChild);
    }

    // Run the function when the DOM is fully loaded
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', addLinkIcons);
    } else {
        addLinkIcons();
    }
})();