Question

I have a form with a input box that I want to auto-complete with values from a IndexedDb objectStore, this works with two over positioned input boxes. I works fine with a simple array but I want to put it to work with the values from a objectStore.
For this I have to put the values available out of the transaction so I can loop through them in the auto-complete function.

1- How can I get the results out of the transaction into a object available in the rest of the code?

2- Is my loop syntax ok “results.value.name.length” (name is my objectStore index) to work with the resultant object?

Getting the IndexedDb objects through a cursor:

var results = [];

var openDbRequest = indexedDB.open(DB_NAME);

openDbRequest.onsuccess = function (e) {
    var db = e.target.result;
    var tran2 = db.transaction("store");
    tran2.objectStore("store").openCursor().onsuccess = function(e) {
        var cursor = e.target.result;
        if (cursor) {
            results = cursor;
            cursor.continue();  
        };
    };                                      
};

The autocomplete function

var auto = "";
var auto_disp = "";

function getName(results) {
    var input = document.forms['myform'].name.value;
    var len = input.length;
    if (input.length) {
        for (i=0; i<results.value.name.length; i++){            
            if (results.value.name[i].substr(0,len).toLowerCase() == input.toLowerCase()){
                auto_disp = input + results.value.name[i].substr(len);
                auto = results.value.name[i];
                break;
            }
        }
    }
document.forms['myform'].auto_name.value = auto_disp;
}

function setName() {
 document.forms['myform'].name.value = auto;
 hideAuto();
}

function hideAuto() {
 document.forms['myform'].auto_name.value = "";
}

The HTML form:

<div style="position: absolute; top: 0; left: 0; width: 200px; z-index: 1;">
 <input type="text" name="name" style="background-color: #fff; border: 1px solid #999; width: 200px; padding: 2px" disabled />
</div>

<div style="position: absolute; top: 0; left: 0; width: 200px; z-index: 2;">
 <input autocomplete="off" type="text" name="auto_name" style="background: none; color:#39f; border: 1px solid #999; width: 200px; padding: 2px" onfocus="getName()"onkeyup="getName()" onkeydown="if (event.keyCode == 13) {setName();};"/>
</div>

UPDATE: Tried a different chaining, now I get the cursor but there’s something wrong with the loop, I’m not getting the auto-completion.

openDbRequest.onsuccess = function (e) {
    var db = e.target.result;

    var tran2 = db.transaction("store");
    tran2.objectStore("store").openCursor().onsuccess = function(e) {

        var cursor = e.target.result;
        if (cursor) { 
            var input = document.forms['myform'].country.value; //the inputted value
            var len = input.length;
            if (input.length) {
                for (i=0; i<cursor.length; i++){            
                    if (cursor.value.nome[i].substr(0,len).toLowerCase() == input.toLowerCase()){
                        auto_disp = input + cursor.value.nome[i].substr(len);
                        auto = cursor.value.nome[i];
                        break;                              
                    }
                }   
            }
            document.forms['myform'].auto_name.value = auto_disp;
            cursor.continue();  
        }   
    };
};

Answer 1

If you want to use it outside the transaction scope, just add it to a variable

var results = [];
var openDbRequest = indexedDB.open(DB_NAME);
openDbRequest.onsuccess = function (e) {
    var db = e.target.result;
    var tran2 = db.transaction("store");
    tran2.objectStore("store").openCursor().onsuccess = function(e) {
         var cursor = e.target.result;
         if (cursor) {
              results.push(cursor.value) 
              cursor.continue();
         };
    };
}; 

After this you van iterate over the results object, and the transaction scope will close once all data is retrieved.