MediaWiki:Gadget-WantedPagesMainspace.js

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// Gadget: WantedPagesMainspace
mw.loader.using(['mediawiki.Title', 'mediawiki.util'], function () {
    if (mw.config.get('wgPageName') !== 'Portal:WantedPages') {
        return;
    }

    var container = document.getElementById('wantedpages-mainonly');
    if (!container) {
        return;
    }

    var bannedPrefixes = [
        'Help:',
        'Template:',
        'The Deep Tech Wiki:',
        'Wikipedia:',
        'Wikipedia talk:',
        'WP:',
        'Wp:',
        'Project:',
        'Category:',
        'File:',
        'Module:',
        'MediaWiki:',
        'User:',
        'User talk:',
        'Talk:'
    ];

    function isBannedPrefix(text) {
        return bannedPrefixes.some(function (p) {
            return text.startsWith(p);
        });
    }

    var bannedExactTitles = [];

    function isBannedExact(text) {
        return bannedExactTitles.indexOf(text) !== -1;
    }

    var links = container.querySelectorAll('a');
    var seen = Object.create(null);
    var cleanedItems = [];

    links.forEach(function (link) {
        var href = link.getAttribute('href') || '';
        var text = (link.textContent || '').trim();
        if (!text) return;

        // Skip "### links" (they always point to Special:WhatLinksHere)
        if (href.includes('Special:WhatLinksHere')) return;

        if (isBannedPrefix(text) || isBannedExact(text)) return;

        var titleText = link.getAttribute('title') || text;
        var titleObj = mw.Title.newFromText(titleText);
        if (!titleObj) return;

        if (titleObj.getNamespaceId() !== 0) return;

        var key = titleObj.getPrefixedDb();
        if (seen[key]) return;
        seen[key] = true;

        cleanedItems.push(link.cloneNode(true));
    });

    // Build a new <ul> only with real content
    var ul = document.createElement('ul');

    cleanedItems.forEach(function (l) {
        var li = document.createElement('li');
        li.appendChild(l);
        ul.appendChild(li);
    });

    // Replace old messy HTML
    container.innerHTML = '';
    container.appendChild(ul);
});