var PUB_TOKEN = "pk_a3b8e89dc25140098066fdfbee19352b";
var IEX_URL = "https://cloud-sse.iexapis.com/beta/last?symbols=jpm,gs,bac&token=" + PUB_TOKEN;

window.addEventListener("WebComponentsReady", function() {
    
    // Get element from the DOM.
    var elem = document.getElementsByTagName("perspective-viewer")[0];

    // Add more rows every 50ms using the `update()` method on the `table` directly.
    var source = new EventSource(IEX_URL);
    var data = []
    source.onmessage = function(event) {
        for(let ev of JSON.parse(event.data)){
            data.push(ev);
        }
        elem.update(data);
        data = [];
    };
});