popup.js

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

function setChildTextNode(elementId, text) {
  document.getElementById(elementId).innerText = text;
}

function changeCSS(elementId,property,value) {
  var element = document.getElementById(elementId);
  element.style.display = value;
}

// Tests the roundtrip time of sendRequest().
function extract_data() {
  setChildTextNode("resultsRequest", "running...");
  chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
    var tab = tabs[0];
    chrome.tabs.sendRequest(tab.id, {counter: 1}, function handler(response) {
      if (response.ret === 0) {
        console.log(response.data);
        setChildTextNode("resultsRequest","complete!");
        changeCSS("div_ics_download","display","block");
        changeCSS("div_gmail_import","display","block");
      }
    });
  });
}

document.addEventListener('DOMContentLoaded', function() {
  document.querySelector('#extract_data').addEventListener(
      'click', extract_data);
});