Javascript: native javascript 代码出现 "Cannot read property "名称“未定义”错误

Question

我正在使用 Chrome 扩展程序。在某个时刻，在名为 CLAWS_Sem_Imagens_Script.js 的脚本中，我使用以下行从页面内的 Iframe 向我的后台页面发送一条消息:

chrome.runtime.sendMessage({type:"execution order",sendToContentScript:true, data:"show"}); 

它在大多数情况下都有效。然而，有时，javascript 在 @extensions: 的 316 行抛出错误 Cannot read property "name"of undefined:消息传递:

if (port.name != kNativeMessageChannel)...

完整的调用堆栈是:

sendMessageImpl @ extensions::messaging:316
(anonymous function) @ extensions::runtime:115
target.(anonymous function) @ extensions::SafeBuiltins:19
(anonymous function) @ extensions::binding:57
target.(anonymous function) @ extensions::SafeBuiltins:19
(anonymous function) @ extensions::binding:385
enviaPalavraAoBackgroundPageImagem @ CLAWS_Sem_Imagens_Script.js:66

有人有任何猜测吗？请向我询问您需要的任何其他信息。

编辑:我的 list :

{
  "manifest_version": 2,

  "name": "name",
  "description": "description",
  "version": "1.0",

  "permissions": [
    "tabs",
    "activeTab",
    "https://google.com.br/",
    "http://localhost/*",
    "https://localhost/*"
  ],


 "background": {"scripts":["background.js"]},

  "content_scripts": [
    {
      "js": ["CLAWS_Content_Script.js", "jquery.js", "Caixas_De_Texto_Dos_Botoes.js"],
      "css": ["CLAWS_Content_Script_CSS.css"],
      "matches": ["<all_urls>"]

    }
  ],

  "web_accessible_resources": [
        "iframe.html",
        "icon.png",
        "Caixas_De_Texto_Dos_Botoes.js",
        "search.png"
  ]


}

Answer 1

如果您重新加载扩展程序而不是包含注入(inject)脚本的页面，也可能会发生这种情况。重新加载页面即可解决问题。