我一直在开发a chrome扩展，如果我在控制台中手动调用方法，它可以完美地工作，但只会下载一个空文件或

function extractData() {
    console.log('Extracting data...');
    const elements = document.querySelectorAll('.sf-grid__main-table');
    console.log('Elements:', elements);
    const data = [];
  
    // Add column headings to the first row of the data array
    //data.push({ itemTitle: "itemTitle", sku_number: "SKU", itemPrice: "Price", notes: "Notes" });
    data.push({ itemTitle: "itemTitle", sku_number: "SKU", itemPrice: "Price", notes: "Notes" });
    
    elements.forEach(element => {
      console.log('Processing element:', element);
      const ellipsis = element.querySelector('.ellipsis');
      const itemTitle = ellipsis.querySelector('strong').textContent;
      console.log('itemTitle:', itemTitle);
      const sku_number = ellipsis.textContent.trim().replace(itemTitle, '');
      console.log('sku_number:', sku_number);
      const itemPrice = element.querySelector('.sfl-tooltip-toggle').getAttribute('value');
      console.log('itemPrice:', itemPrice);
  
      // Check if the item price is over 10.00 and the SKU number begins with "AQ," "Y," or "BTLG"
      let notes = "";
      if (parseFloat(itemPrice) > 10.00 && ["AQ", "Y", "BTLG"].includes(sku_number.substring(0, 2))) {
        notes = "potential multibuy";
      }
  
      data.push({ itemTitle, sku_number, itemPrice, notes });
    });
 
  
    // Convert the data array to CSV format
    const csvContent = data.map(row => Object.values(row).join(',')).join('\n');
    console.log('csvContent:', csvContent);
  
    // Create a Blob object from the CSV content
    const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8' });
  
    // Create an object URL from the Blob object
    const url = URL.createObjectURL(blob);
  
    // Use the downloadFile function to download the file
    downloadFile(url, 'data.csv');
  }
  
  function downloadFile(url, fileName) {
    // Create an anchor element
    const anchor = document.createElement('a');
    anchor.style.display = 'none';
    anchor.href = url;
    anchor.download = fileName;
    document.body.appendChild(anchor);
  
    // Click the anchor element
    anchor.click();
  
    // Remove the anchor element
    document.body.removeChild(anchor);
  
    // Revoke the object URL
    URL.revokeObjectURL(url);
  }
  
  // Add a listener for the "click" event of the browser action
  chrome.browserAction.onClicked.addListener(extractData);

清单.json

{
    "manifest_version": 2,
    "name": "CSV Generator",
    "description": "Extracts data from a table ",
    "version": "1.0",
    "permissions": [
      "activeTab",
      "downloads"
    ],
    "background": {
      "scripts": ["extract-data.js"]
    },
    "browser_action": {
      "default_icon": "icon.png",
      "default_title": "Extract Data"
    }
  }

我试过在dom中添加一个链接并点击它，也试过使用blob。不知何故，我在点击和extractData方法之间丢失了数据。想知道是否有一些我不知道的安全问题？