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I really don't know why this isn't working, I have a background.js:

chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
    setTimeout(() => {
        chrome.tabs.sendMessage(tabs[0].id, {name: "test"}, (response) => console.log(response))
    }, 1000)
})

content.js:

chrome.runtime.onMessage.addListener((message) => {
    console.log("message:", message.name)
})

manifest.json:

{
    "name": "Test",
    "version": "0.1.7",
    "description": "blah blah",
    "manifest_version": 3,
    "background": {
        "service_worker": "background.js"
    },
    "content_scripts": [
        {
            "matches": ["<all_urls>"],
            "js": ["content.js"]
        }
    ],
    "permissions": [
        "activeTab",
        "desktopCapture"
    ],
    "action": {
        "default_title": "Click!"
    }
}

When I click the extension, I get this in the dev tool console: Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.

And this in the browser console:

    extensions.js:2897 Uncaught TypeError: Failed to construct 'URL': Invalid URL
        at ExtensionsErrorPageElement.onSelectedErrorChanged_ (extensions.js:2897:2882)
        at Object.re [as fn] (polymer_bundled.min.js:1:24397)
        at se (polymer_bundled.min.js:1:24155)
        at ee (polymer_bundled.min.js:1:23929)
        at ExtensionsErrorPageElement._propertiesChanged (polymer_bundled.min.js:1:33807)
        at ExtensionsErrorPageElement._flushProperties (polymer_bundled.min.js:1:17256)
        at ExtensionsErrorPageElement._flushProperties (polymer_bundled.min.js:1:32692)
        at ExtensionsErrorPageElement._invalidateProperties (polymer_bundled.min.js:1:32509)
        at ExtensionsErrorPageElement._setProperty (polymer_bundled.min.js:1:32438)
        at Object.defineProperty.set (polymer_bundled.min.js:1:15801)

What am I doing wrong?? Thanks in advance!

I also tried the background.js without setTimeout, but got the same error. I thought it was called too early, before the content script is loaded, so I delayed it a bit, but same result.

Koala Koala
  • 11
  • When you install or reload the extension, its content script doesn't run in existing tabs. See [Chrome extension content script re-injection after upgrade or install](https://stackoverflow.com/q/10994324) – wOxxOm Oct 28 '22 at 09:47

0 Answers0