Scrapboxの公式ブックマークレットに任意のタグを追加する

javascript: (function () {
    var title = window.prompt('Scrap \"Scrapbox\" to mtane0412.', document.title);
    if (!title) return;
    var lines = ['', '[' + window.location.href + ' ' + document.title + ']'];
    var quote = window.getSelection().toString();
    if (quote.trim()) lines = lines.concat(quote.split(/\
/g).map(function (line) {
        return ' > ' + line
    }));
    lines.push('');
    lines.push('#scrap'); //これを追加
    var body = encodeURIComponent(lines.join('\
'));
    window.open('https://scrapbox.io/mtane0412/' + encodeURIComponent(title.trim()) + '?body=' + body)
})();