是否可以从Chrome扩展的内容脚本访问在主窗口中创建的聚合物元素的属性？

// 内容脚本
chrome.runtime.sendMessage({action: "getPolymerElementProperty", elementId: "myElement"}, function(response) {
    console.log(response.property);
});

// 后台脚本
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
    if (request.action === "getPolymerElementProperty") {
        chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
            chrome.scripting.executeScript({
                target: {tabId: tabs[0].id},
                func: getPolymerElementProperty,
                args: [request.elementId]
            }, function(result) {
                sendResponse({property: result.result});
            });
        });
    }
});

// 网页脚本
function getPolymerElementProperty(elementId) {
    const element = document.getElementById(elementId);
    return element.property;
}

// 网页脚本
window.getPolymerElementProperty = function(elementId) {
    const element = document.getElementById(elementId);
    return element.property;
};

// 内容脚本
const property = window.getPolymerElementProperty("myElement");
console.log(property);