Twitter JP tweets in Meiryo font

gistfile1.txt

javascript:(function(){
    var jpReg = /[\u3000-\u303F]|[\u3040-\u309F]|[\u30A0-\u30FF]|[\uFF00-\uFFEF]|[\u4E00-\u9FAF]|[\u2605-\u2606]|[\u2190-\u2195]|\u203B/g, modes = [];
    function addMode(modeName) {
        var title = 'Tweets [';
        modes.push(modeName);
        title += modes.join(', ') + ']';
        $('#content-main-heading').text(title);
    }
    if (!window.addMode) {
        window.addMode = addMode;
    }
    function filteredNewNodeCallback(root, selector, callback) {
        var obs, i;
     
        if (!root || !selector || !callback) {
            return;
        }
     
        function filterAndCallback(node) {
            var matches = [], childMatches;
            if (node.matches(selector)){
                matches.push(node);
            }
            childMatches = node.querySelectorAll(selector);
            if (childMatches.length !== 0) {
                matches = matches.concat([].slice.call(childMatches))
            }
            matches.map(callback);
        }
     
        obs = new MutationObserver(function(mutations){
            mutations.forEach(function(mutation){
                for(i = 0; i < mutation.addedNodes.length; i++) {
                    if (mutation.addedNodes[i].nodeType === 1) {
                        filterAndCallback(mutation.addedNodes[i]);
                    }
                }
            })
        });
        obs.observe(root, {childList: true, subtree: true});
    }
    filteredNewNodeCallback($('.stream-container')[0], '.js-stream-item', function(tweet){
        var tweetHTML = tweet.innerHTML;
        if(jpReg.test(tweetHTML)) {
            tweet.style.fontFamily = 'Meiryo';
        }
    });
    window.addMode('jp Meiryo');
}());