Dev Helper
Dev Helper Extension
- Profiling webpages and drawing charts showing loading time for all assets, split by domain (including time till the first byte received)
- Set up rewrite rules to override request and response urls, allowing developers to test without actually deploy new code.
Developers could override, add or replace request and response headers to test different scenarios. For example adding 'Access-Control-Allow-Origin: *' in the response header section will resolve cross domain script blocking.
Another way to use it is to replace asset or script (JavaScript and CSS) with local copy. This way the developer could make changes and test the functionality without deployment.
1.Install the extension from chrome app store.
2. Open page’s source code, and find the script tag, that you want to re-write.
3. Copy the code, and host it locally
4. Set up rewrite rule to load this file from your local web host
Note, keep in mind that Match url is actually a regex so any regEx character should be escaped!
For example if you want to match http://mysite.com/global.js?version=1 and redirect it to http://localhost?version=1
You could do this:
Match url: http:\\/\\/mysite\\.com\\/global.js?(.*)
Replacement URL: http://localhost?($1)
The $1 will replace all query string parameters in the replacement url with these from the original url.
- setting up rewrite rules to load assets from different locations.
\tFor example a developer could write a regular expression pattern to match all JavaScript files in particular website where he/she is working on, and load them from their local host. This way active development could be done in real time, and new features could be tested before deploying to production. This method is also useful to debug a production issues.
\texample: if developer wants to test how the new code will affect the production website: http://www.mysite.com where all Java Script comes from: http://mysite.com/scripts/all_java_script.js file, they could write a rule that will match 'http://mysite.com/scripts/all_java_script.js' and load it from the localhost 'http://localhost/all_java_script.js'
\t\t\t
- Setting proxy rules that match different Regular expression patterns.
\tDevelopers could write different matching patterns for different proxy rules.
- Script injection allowing to add new CSS or Java Script to a website for testing purposes.
Detailed instructions and examples of how to use it could be found here: https://www.toni-develops.com/a-homepage-section/projects/using-dev-helper-chrome-extension-for-local-development/
Source Manifest.json
How to download and manually install Dev Helper extension for Chrome
Looking for a way to install Dev Helper extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.
However, you may need to install Dev Helper extensions manually, this article outlines two simple methods to effortlessly install Dev Helper extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.
Method 1: Download Dev Helper extension and manually install through Drag &Drop
If you ever need to manually install a Dev Helper extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.
Step 1: Download the Dev Helper Extension by clicking the "Download CRX" button on the website.
Look for the Dev Helper extension you wish to install. Go to the website and download the Dev Helper extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Dev Helper extension that contains all the data.
Step 2: Extract &Arrange Files
Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.
Step 3: Go to the Chrome Extensions Page
Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.
Step 4: Drag and Drop the Extension
Now, go to the folder where you extracted the Dev Helper extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.
Step 5: Complete the Installation
Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.
Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.
Method 2: Download Dev Helper extension for Chrome and install in Developer Mode
This is another method to install Dev Helper extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.
Step 1: Download the Dev Helper extension file
Select and download the Dev Helper extension by clicking the 'Download CRX' button on the website.
Step 2: Extract the downloaded contents
Convert the file to a ZIP file if it is in CRX format then extract the Dev Helper extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Dev Helper extension running.
Step 3: Open Chrome Extension Setting Page
In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.
Step 4: Enable Developer Mode
After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.
Step 5: Load the Unpacked Extension
Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."
Step 6: Select the Extension Folder
Once the pop-up opens upon clicking Load unpacked, select the Dev Helper extension directory and click on the "Select Folder "button.
Step 7: Confirm and Install
After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.
Conclusion
Here we've made a step-by-step guide on How to manually install Dev Helper extension in 2 ways. We hope this guide proves helpful.
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