Get back the ability to process user timelines in JavaScript without OAuth.

Twitter API v1.1 User Timeline JavaScript Solution

var TweetFetcher = function(id)
{
    this.id = id;
    this.instance = 'tf_' + (new Date().getTime());
    window[this.instance] = this;
};

TweetFetcher.prototype.fetch = function(cb, limit)
{
    this.cb = cb;
    this.limit = limit || 20;

    var s = document.createElement('script');
    s.src = '//cdn.syndication.twimg.com/widgets/timelines/' + encodeURIComponent(this.id) +
            '?&lang=en&callback=' + encodeURIComponent(this.instance + '.parse') +
            '&suppress_response_codes=true&rnd=' + (new Date().getTime());
    document.getElementsByTagName('head')[0].appendChild(s);
};

TweetFetcher.prototype.parse = function(res)
{
    var raw = document.createElement('div');
    raw.innerHTML = res.body;

    var tweets = raw.querySelectorAll('li.tweet'),
        limit  = (tweets.length < this.limit) ? tweets.length : this.limit,
        output = [];

    for (var i = 0; i < limit; i++) {
        var tr = tweets[i], t = {};

        t.id = tr.getAttribute('data-tweet-id');
        t.author = {
            handle: tr.querySelector('span.p-nickname b').innerText,
            name: tr.querySelector('span.p-name').innerText
        };
        t.time = {
            stamp: tr.querySelector('time.dt-updated').getAttribute('datetime'),
            pretty: tr.querySelector('time.dt-updated').getAttribute('aria-label')
        }
        t.isRetweet = !! tr.querySelector('.retweet-credit');
        t.retweets = tr.querySelector('span.stats-retweets')
            ? parseInt(tr.querySelector('span.stats-retweets').innerText.replace(',', ''), 10)
            : 0;

        // delete all unnecessary tweet content tags

        var content = tr.querySelector('p.e-entry-title'),
            tags = content.querySelectorAll('*');

        for (var j = 0; j < tags.length; j++) {
            var tag = tags[j], k = 0, del = [];

            for (k = 0; k < tag.attributes.length; k++)
                if (tag.attributes[k].name !== 'href')
                    del.push(tag.attributes[k].name);

            while (del.length)
                tag.removeAttribute(del.pop());
        }

        t.content = content.innerHTML.replace(/<\/?b[^>]*>/gi, '');

        output.push(t);
    }

    this.cb(output);
};

// example

var tf = new TweetFetcher('354188847791366144');

tf.fetch(function(tweets)
{
    console.log(tweets);
}, 2);