My extension seems to be missing the content script I uploaded

I am currently developing an extension for Google Chrome.

My goal is to create a content script that can retrieve meta tags from the tab when the popup is clicked.

In my manifest, I have included the following permissions:

"content_scripts": [{
    "js": ["src/js/DOMReader.js"],
    "matches" : [
        "*://*/*",
        "http://*/*",
        "https://*/*"
    ]
}],
"permissions": [
    "unlimitedStorage",
    "storage",
    "notifications",
    "activeTab",
    "tabs",
    "bookmarks",
    "browsingData",
    "identity",
    "topSites",
    "history"
]

Every time I call the content script, it returns the default error value. When I try to locate it using the developer console sources tab, I cannot find my content scripts.

It is frustrating because I am unable to debug my code properly without being able to see the content script. I just want to understand why my content script is not visible and my searches have not provided any answers.

javascriptgoogle-chromecontent-script

Answer №1

According to the documentation:

Content scripts run in a unique environment known as an isolated world. They can access the DOM of the page they are injected into, but not any JavaScript variables or functions created by the page. Each content script operates as if there is no other JavaScript running on the page it's operating on.

This implies that you won't be able to observe it on the same page being inspected by your developer tools. Instead, you must inject code into the specific webpage you wish to inspect. Learn more about this method described here (which includes additional information regarding content scripts).

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

The file "tfjs_binding.node" could not be located in the directory where @tensorflow is installed

After attempting to utilize certain functionalities of TensorFlow, I encountered an error indicating that "tfjs_binding.node" was not found in the @tensorflow installation folder. I made sure to install Python 2.7 as a prerequisite for TensorFlow and veri ...

javascriptpythonnode.jstensorflownpm

Tips for using JavaScript to style an array items individually

I have currently placed the entire array within a single div, but I would like to be able to display each element of the array separately so that I can style "date", "title", and "text" individually. This is my JSON structure: [ { "date": "Example ...

javascripthtmlcssjsonfetch-api

If the item already exists within the array, I aim to replace the existing object with the new one

I am faced with a situation where I have an array of objects, and when a user selects an option, it adds a new object to the array. My goal is to write a code that can check if this new object's key already exists in one of the objects within the arra ...

javascriptarraysreactjsobjectfilter

Adjust background color on click using JavaScript

Could someone provide me with the JavaScript code to change the background color of a page from blue to green when a button is clicked? I have seen this feature on many websites but haven't been able to write the code myself. I am specifically lo ...

javascripthtmlcssreactjs

Utilizing JavaScript for enhancing the appearance of code within a pre element

Is there a way to dynamically highlight the code inside a pre element using vanilla JavaScript instead of JQuery? I'm looking for a solution that colors each tag-open and tag-close differently, displays tag values in another color, and attributes with ...

javascripthtmlpre

Unexpected Error: Unable to access the 'position' property of an undefined element (D3.JS)

This error occurred when I attempted to fetch JSON data and convert it into a line graph. An unexpected TypeError was thrown: Unable to access the 'position' property of undefined Below is the relevant portion of the JS code: d3.json("../js/ ...

javascriptjsonsvgd3.jshtml5-canvas

Trigger the jQuery function based on the ID modification executed by jQuery

Is it possible to change the id of an HTML element using this function? $("#test").attr('id', 'test2'); Here is an example of the code: $("#test").click(function() { $("#test").attr('id', 'test2'); alert(& ...

javascriptjquery

Tips on determining the type of DOM element for CSS Selector adjustment

In this case, $self is not returning the expected result and I am getting "undefined". To adjust the CSS selector to correctly target the desired element, I need to determine which element type I am dealing with. Is it the "ul", "li", or "a" element? Whil ...

javascriptjquerycss

Stop HTML <dialog> from automatically closing using Vue

I'm working on a project where I need to use Vue to programmatically prevent an HTML dialog element from closing when the close event is triggered. Here's the code snippet I am currently using: import {ref} from 'vue'; const dialogTe ...

javascripthtmlvue.jsvuejs3modal-dialog

"Encountering an issue when trying to choose a value from a select list using jQuery and the

What am I missing here or what is the correct approach to solve this? Take a look at the following code snippet: code snippet $(document).ready(function() { $(".metric_div").hide(); $("#solid_radio").click(function() { $("#solid").show(); ...

javascriptjqueryhtml

"Process the contents of a file by reading it line by line in a

Currently, I am reviewing the documentation for the nodejs readline module in order to tackle a task that involves reading a very large file line by line. The solution using readline seems promising, although I require it to read lines synchronously - mean ...

javascriptnode.jsparsingreadline

Tips for accurately determining the count, rather than the character length, of JSON data

After running my code, I believe it returns a JSON array. The resulting JSON array is then stored in a JavaScript variable called 'result'. When I console.log(result); in Firefox, the output shown is: [{"id":"G24","value":"Zas, S"},{"id":"G75" ...

javascriptjson

Is there a way to prevent my jQuery from triggering the <a href> unless the ajax post is successful?

I am attempting to update the database and redirect the user's browser to a new page with just one click. Here is how the HTML appears: <a id='updateLiveProgress' style='width:118px;' href='~link~'>Click here</ ...

javascriptjqueryajax

Is it possible to modify the sub/child divs within a draggable parent div and assign them a different class?

Greetings, after being a long-time reader, I have finally decided to post for the first time. In the process of creating a webpage with jQuery drag and drop divs, I am curious about how to change the class of a child div within a draggable div once it is d ...

javascriptjqueryhtmlcssjquery-ui

Storing JWT API tokens in a secure location

Currently, I am in the process of developing the API portion for an application and focusing on implementing JWT authentication. At this point, I am generating a token and sending it back to the front-end as part of a JSON object when a user is created. Ho ...

javascriptnode.jsexpressjwtsequelize.js

Having trouble parsing an array from req.body using Node.js Express

I am currently facing an issue while trying to retrieve an array from a JSON request using Postman. In my Node.js application, I am able to read all values from req.body except for the array. When attempting to access the array, I only receive the first va ...

javascriptnode.jsexpress

Leverage the power of Node.js by utilizing http.get along with

I have been working on integrating a library (available here) into my project, which is capable of generating QR codes and various other types of codes. My current issue revolves around making a request where I can access both the req and res objects in o ...

javascriptnode.jshttp

Exploring Angular 2 with ng-bootstrap Library

As I delve into learning Angular2, my goal is to incorporate ng-bootstrap into my project. However, I have encountered issues when trying to import ng-bootstrap and create a functional project. Being a novice in this field, I am unsure if the problem lies ...

javascripttwitter-bootstrapangularng-bootstrap

When utilizing row.add in AngularJS and jQuery DataTables, the ng-click function may not function as expected

As a newcomer to angularjs, I have successfully implemented the jQuery DataTable directive with angularJS. However, I am encountering an issue when trying to add a JavaScript function to "TR" dynamically using "ng-click", as it does not seem to be recogniz ...

javascriptjqueryangularjsdatatables

Modifying the CSS based on the SQL data retrieved

I'm currently diving into the world of php and jquery, attempting to build a webpage that displays player information and their status fetched from my Mysql server. Although the core code is functional, it's a mashup of snippets gathered from va ...

javascriptphpjqueryhtmlmysql