popup.js

// Copyright 2018 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.

'use strict';

// let changeColor = document.getElementById('changeColor');
// chrome.storage.sync.get('color', function(data) {
//   changeColor.style.backgroundColor = data.color;
//   changeColor.setAttribute('value', data.color);
// });

let gradientizer = document.getElementById('gradientizer');

  gradientizer.onclick = function(element) {
    // let color = element.target.value;
    chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
      chrome.tabs.executeScript(
          tabs[0].id,
          {code: 'reGradient()'});
    });
  };

  // changeColor.onclick = function(element) {
  //   let color = element.target.value;
  //   chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
  //     chrome.tabs.executeScript(
  //         tabs[0].id,
  //         {code: 'document.body.style.backgroundColor = "' + color + '";'});
  //   });
  // };