Queries being run twice on sql.js - node.js

Question

I'm using SQLite with sql.js on my project and I have been having some trouble with my implementation. Seems like the queries are being run on the database twice because for the for the INSERT statements I get 2 records in the DB.
The way I do it, I create the SQL and then pass it on to this method (the opts variable contains all of the data being put into the database):
prepareStatementAndCompileResults(db, sql, opts){
const stmt = db.prepare(sql);
const result = stmt.getAsObject(opts);
var rows = [];
if(!this.isEmpty(result)){ // isEmpty is a simple method that checks for empty objects
rows.push(result);
}
while(stmt.step()) {
var row = stmt.getAsObject();
rows.push(row);
}
this.saveToFile(db);
stmt.free();
return rows;
},
Here is a sample SQL INSERT that is being run twice
INSERT OR IGNORE INTO tag_event (tag_id, event_id, unique_string)
VALUES (:tag_id,:event_id, :unique);
Here is what the opts variable would look like for this query:
var opts = {
[':tag_id']: 1,
[':event_id']:1,
[':unique']: '1-1'
}

Answer 1

Because you're pushing it into row 2 time.
// if not empty will add to row
if(!this.isEmpty(result)){ // isEmpty is a simple method that checks for empty objects
rows.push(result);
}
// not sure what step() does but I'm assuming this will also run
while(stmt.step()) {
var row = stmt.getAsObject();
rows.push(row);
}
Verify by using a debugger or just console.log(rows) after the while loop before the save

Answer 2

So, what it turns out I needed to do was bind the variables to the prepared statement before getting the rather than binding them through getAsObject. This is much more efficient. My API response time on a local test went from 785ms to 14.5ms
prepareStatementAndCompileResults(db, sql, opts){
const rows = [];
const stmt = db.prepare(sql);
stmt.bind(opts);
while(stmt.step()) {
var row = stmt.getAsObject();
rows.push(row);
}
this.saveToFile(db);
stmt.free();
return rows;
},