Discount code fields

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$w('#button64').onClick(event,$w)=>{

 if( $w('#input3').value == undefined){
 // make what should be done.
         }


else{
        wixData.query("DiscountCodes")
            .eq('title', $w('#input3').value)
            .eq('valid',true)

            .find()
            .then( (results) => {

 if(results.length!==0){
 //make what should be done.
            total = 'amount'
            calc()
            $w('#group9').hide();
            $w('#text227').hide();
            $w('#group8').show();
            }

 else{
 // make a notice that this code is not available.
            total = 0
            calc()
            $w('#group9').show();
            $w('#text227').show();
            $w('#group8').hide();
      }
 
});
 // the previous code. (checking the availability of the discount code in the collection.)
        }
});
}