IndexSQL is a tool that helps with the use of IndexedDB by making it SQL like. Its use is as simple as:

var indexSQL=new IndexSQL("demo");
indexSQL.execute("CREATE TABLE test (column1 STRING, column2 BOOLEAN, column3 NUMBER);",
    function(result){
        //DO SOMETHING
    }
);

To add it into your webpage you can use:

<script src="https://dandimrod.github.io/IndexSQL/src/IndexSQL.min.js" type="​​application/javascript"></script>

For more information, please check our documentation.
You can also check a living demo.