GitHub AST Viewer is a code viewer extension for chrome. it's a free extension , it has 98 active users since released its first version, it earns an average rating of 3.50 from 2 rated user, last update is 2805 days ago.
The extension adds an "AST" button to the GitHub page of any file in a repository. Clicking it will display the abstract syntax tree representation of the code. Currently only JavaScript code is supported, but more language support to come in the future! (The extension is not officially affiliated with GitHub in any way. Use at own risk.)
You could download the latest version crx file or older version files and install it.
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100% user give 2-star rating. Read reviews of github ast viewer
You could find more help information from github ast viewer support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of github ast viewer.
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I have literally never come across a file that this worked for.