get the return value of function in javascript

Question

I have a 2 files. file1 and file2. In file1 i have input box. so, i am getting this value in a javascript function like this

     <td>
         <input  onmouseleave="detect(this.value)" id="myqty"  value="'.$items['qty'].'">
     </td>
     <script>
            var retVal; 
            function detect(value)
            {

                 retVal=value;
                 return retVal

             }
       </script>

I am returning that value. So in file2 i have javascript where i want to receive that returned value. how can i?

file2

 $(document).on('mouseleave', '#myqty', function(e){
  e.preventDefault();
   var returnValue= detect();
});

but in var returnValue= detect(); i am getting nothing.

Since you are using JQuery, you can get the required value as $("#myqty").val() — Milan Chheda
– Milan Chheda, Commented Aug 1, 2017 at 6:39
i want get the value of returned value of javascript function. how can i? — noushad mohammed
– noushad mohammed, Commented Aug 1, 2017 at 6:40
You aren't doing any processing with that value, so why not use $("#myqty").val() whenever you want the input value? — Milan Chheda
– Milan Chheda, Commented Aug 1, 2017 at 6:41
But you have not done any change in function so its better to take it using $("#myqty").val() — RJParikh
– RJParikh, Commented Aug 1, 2017 at 6:41
javascript can't get something from a different web page directly like that at all — Jaromanda X
– Jaromanda X, Commented Aug 1, 2017 at 6:41

FriendlyGhost · Accepted Answer · 2017-08-01 06:44:25Z

1

Maybe its because function is expecting a parameter. Try this instead:-

$(document).on('mouseleave', '#myqty', function(e){
  e.preventDefault();
   var returnValue= detect($(this).val());
});

answered Aug 1, 2017 at 6:44

FriendlyGhost

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Milan Chheda · Accepted Answer · 2017-08-01 06:47:39Z

0

You should use class and this how your code can be tweaked and updated:

$(document).on('mouseleave', '.myqty', function(e) {
  e.preventDefault();
  console.log($(this).val());
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<td>
  <input class="myqty" value="123">
</td>
<td>
  <input class="myqty" value="324">
</td>
<td>
  <input class="myqty" value="36546">
</td>
<td>
  <input class="myqty" value="654656">
</td>

answered Aug 1, 2017 at 6:47

Milan Chheda

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Comments

Farsay · Accepted Answer · 2017-08-01 07:16:25Z

0

You need to pass parameter in here var returnValue= detect();

First you dont need 2 functions for this. Why are you using 2 functions for this. You want quantity in another js file you can do all the code there only.

 $(document).ready(function(){
        $('#myqty').mouseleave(function(){

                var retVal= $('#myqty').val();
                alert(retVal);
        });
 });

edited Aug 1, 2017 at 7:16

answered Aug 1, 2017 at 7:06

Farsay

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