viewerLoad = window.addEventListener('WebComponentsReady', function() {
const viewer = document.getElementsByTagName('perspective-viewer')[0];
require('https://unpkg.com/@jpmorganchase/perspective-examples/build/hypergrid.plugin.js');
require('https://unpkg.com/@jpmorganchase/perspective-examples/build/highcharts.plugin.js');
loadData(dataUrl).then(buffer => {
console.log('Loading view data...');
viewer.load(buffer);
viewer._toggle_config();
});
})