I want to send variable data form html to flask  

This is my html js code.  

I can not send that variable data to the flask in that way.  

```
<script>
        var data = "shan";
        window.location.href='{{ url_for( "move_forward" , title=data) }}';
</script>

```

But when I used below way I can send it

```
<script>
        window.location.href='{{ url_for( "move_forward" , title="shan") }}';
</script>

```

But finally I want to assign some value to the variable and I want to send it to the flask.  

How can I do it

```
 @app.route("/move_forward/<title>", methods=['GET', 'POST'])
        def move_forward(title):
             print(title)

```