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sql.js is a javascript SQL database. It allows you to create a relational database and query it entirely in the browser. You can try it in this online demo. It uses a virtual database file stored in memory, and thus doesn't persist the changes made to the database. However, it allows you to import any existing sqlite file, and to export the created database as a JavaScript typed array. sql.js uses emscripten to compile SQLite to webassembly (or to javascript code for compatibility with older...
...The changes you make are applied everytime you visit the specified website(s).
**How to use?**
- Simple, First open the extension.
- Choose 'JavaScript', 'CSS' or 'HTML'.
- Create a new file by pressing 'new'.
- Write your own code.
- Press the 'Manipulate' button to test your code.
- To make sure your code is run every time you visit a specific website do the following:
- Put the URLs of the websites in the 'active websites' textarea.
- Check the 'active' checkbox.
- Reload the page to make sure it works.