Javascript: "Cannot read property "name" of undefined" error at native javascript code

Question

I'm working in a Chrome extension. At some point, in a script called CLAWS_Sem_Imagens_Script.js, I send a message from an Iframe inside the page to my background-page with the following line:

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

It works most of the times. However, sometimes, javascript throws the error Cannot read property "name" of undefined, at the line 316 of @extensions::messaging:

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

The full call stack is:

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

Do someone has any guess? Please ask me for any additional info you need.

EDIT: My manifest:

{
  "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"
  ]


}

Are you using an event page ("persistent": false)? Where is that error displayed (webpage console or background page console)? And just in case add your manifest.json to the question. — woxxom
– woxxom, Commented Nov 16, 2015 at 21:46
@wOxxom no, just a background page! The error is displayed at the consolse we see when we open the developer tools - I make no idea of how we call it. And the manifest is added : ) — Mr Guliarte
– Mr Guliarte, Commented Nov 16, 2015 at 21:52
First option! I didn't know this second one, for saying the truth! — Mr Guliarte
– Mr Guliarte, Commented Nov 16, 2015 at 21:55
@wOxxOm think I found out, and it was really a stupidness of mine if it is true. When I tried to send the message, the extensions was disabled (though the page wasn't updated, so I didn't realize it). I'll try to confirm that! — Mr Guliarte
– Mr Guliarte, Commented Nov 16, 2015 at 21:58
@That1guyoverthr I don't know if it's your case, but if you are in one page and you disable the extension (going at chrome://extensions and unmarking the box aside it), but remain on that page, the extension apparently continues to work, but it's background page gets disabled...hope it helps! — Mr Guliarte
– Mr Guliarte, Commented Nov 30, 2015 at 23:19

Tomáš Vyčítal · Accepted Answer · 2016-06-19 12:24:28Z

2

This can also occur if you reload the extension but not the page with injected script. Reloading the page solves the problem.

answered Jun 19, 2016 at 12:24

Tomáš Vyčítal

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Mr Guliarte · Accepted Answer · 2016-03-23 00:51:16Z

0

Just to clarify, the error was occurring because the extension was disabled (chrome://extensions -> unmark the check box), and then the background page was disabled, even with the extension aparently working. Regards!

answered Mar 23, 2016 at 0:51

Mr Guliarte

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