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I am a visual basic programmer, I designed software for learning English in Sudan and I wanted to transfer this software to work on mobile devices so I started learning javascript. I managed to work out most of the software. the last thing I need is code to open a database table and retrieve fields into variables with the functionality of moving next/previous through the table. . I read about some terms like indexeddb and others but I could figure out how to make them work. please provide clear steps. thanks in advance

What I have tried:

<!DOCTYPE html>  
<html>  
<head>  
<meta http-equiv = "Content-Type" content = "text/html; charset = utf-8" />  
<title> JavaScript IndexedDb Demo </title>  
</head>  
<body>  
<h2> JavaScript IndexedDb Demo </h2>  
<p id = "demos"> </p>  
</body>  
<script>  
  

function readRecords() {
    var mydb;
    const request_variable = indexedDB.open('book', 1);
    
mydb =request_variable.result;


var trans = mydb.transaction(["beginner"]);
var objectStore = trans.objectStore("beginner");
var request1 = objectStore.get("1");
alert("database was opened")
};
</script> 
</html>  
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