alfabank currencies

main.js

function loadScript () {
  return $.getScript('https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js');
}

function loadData () {
  return $.getJSON('https://alfabank.ru/ext-json/0.2/exchange/cash/?offset=0&limit=20').then(function (d) { return d.response.data.usd.filter(function (x) {return x.type==='buy'}); });
}

function drawChart () {
  $.when(loadData(), loadScript()).then(function (currencies) {
    var table = $('.currency-root');
    var canvas = $('<canvas>');
    canvas.css({
        width: table.width() + 'px',
        height: table.width() / 2 + 'px',
        display: 'block',
        margin: '1em auto'
    })
    table.after(canvas);
    var data = {
      labels: currencies.map(function (x){return x.date}).reverse(),
      datasets: [
        {
            label: "",
            fillColor: "rgba(220,220,220,0.2)",
            strokeColor: "rgba(220,220,220,1)",
            pointColor: "rgba(220,220,220,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(220,220,220,1)",
            data: currencies.map(function (x){return x.value}).reverse()
        }
      ]
    };
    var chat = new Chart(canvas.get(0).getContext("2d")).Line(data);
  });
}

if (location.href === 'https://alfabank.ru/omsk/currency/') {
  drawChart();
}