Bookmarklet to view Twitter poll result without voting

twitter-poll-result.js

(
    function() {
        var pod = document.getElementById('permalink-overlay-dialog');

        if (!pod) return alert('Not a valid poll');

        var iframeList = pod.getElementsByTagName('iframe');

        if (iframeList.length === 0) return alert('Not a valid poll');
        else if (iframeList.length > 1) return alert('Not a valid poll');

        var iframe = iframeList[0];
        var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
        var pollChoices = innerDoc.getElementsByClassName('PollXChoice-choice');
        var result = '';

        for (var choice of pollChoices) {
            var choiceData = choice.getElementsByClassName('PollXChoice-choice--text');
            var choiceDetailSpan = choiceData && choiceData[0];
            var spanList = choiceDetailSpan && choiceDetailSpan.childNodes;

            if (spanList && spanList.length > 2) {
                result += spanList[1].textContent + ': ' + spanList[0].textContent + '\n';
            }
        }

        return alert(result || 'Not a valid poll');
    }
)();