block weibo keyword

weibo4b.js

// ==UserScript==
// @name         weibo4b
// @namespace    http://tampermonkey.net
// @version      0.3
// @description  屏蔽匹配关键字的微博
// @author       biaocy
// @match        https://weibo.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var NOT_ALLOW_KW = ['高考', '送考', '备考'];

    var observeDOM = (function() {
        var MutationObserver = window.MutationObserver || window.WebKitMutationObserver,
            eventListenerSupported = window.addEventListener;

        return function(obj, callback) {
            if( MutationObserver ) {
                var obs = new MutationObserver(function(mutations, observer) {
                    if( mutations[0].addedNodes.length || mutations[0].removedNodes.length )
                        callback(mutations);
                });
                obs.observe( obj, { childList:true, subtree:true });
            } else if( eventListenerSupported ) {
                obj.addEventListener('DOMNodeInserted', callback, false);
                obj.addEventListener('DOMNodeRemoved', callback, false);
            }
        };
    })();

    observeDOM( document.body, function(mutations) {
        for(let mutation of mutations) {
            for(let node of mutation.addedNodes) {
                if( node.nodeType === Node.ELEMENT_NODE) {
                    var textEls = node.querySelectorAll('.WB_text');
                    for(let el of textEls) {
                        for(let kw of NOT_ALLOW_KW) {
                            if(el.textContent.indexOf(kw) > -1) {
                                let p = parent(el, 'WB_cardwrap WB_feed_type S_bg2');
                                if( p ) {
                                    let nickname = p.querySelector('a[nick-name]');
                                    let lnk = p.querySelector('a[node-type="feed_list_item_date"]');
                                    console.log('Deleted | %s | %s | %s', nickname, el.textContent, lnk.href);
                                    p.remove();
                                }
                            }
                        }
                    }
                }
            }
        }
    });

    function parent(el, className) {
        var pEl;
        while(el) {
            if(el.className && el.className.indexOf(className) > -1) {
                pEl = el;
                break;
            }
            el = el.parentElement;
        }
        return pEl;
    }
})();