Forum: Ruby Basic Question on passing value to Javascript

Ef77f58090c3abe70b827a8b21e5ec74?d=identicon&s=25 Adarsh Mehrotra (adarsh12in)
on 2014-06-18 07:29

I am fairly new to Ruby (& Sinatra). I have a web form (ERB) where none
of the fields can be blank and I need client side validation to show
fields are empty.

I want to get the value from text box field and pass to javascript to
find out if it is empty. As I realize, server side is getting mixed up
with client side and i am not getting the value passed  correctly.

Here is my code-- Can someone please guide (apologize the query is


          <td> <label for="txtHost"><h4>Host</h4></label></td>
          <td><input type="text" id="txtHost" name="txtHost"></td>
        <@str = txtHost.value>

<script language="javascript">
    function validateForm() {
          var x = '<%= @str %>'
        if (x == null || x == "") {
            alert("Host must be filled out");
            return false;
9fa32e40121025416cb389b0f5b69cbb?d=identicon&s=25 Benjamin Klotz (benny1992)
on 2014-06-18 13:49
Maybe this could help you -

Greetings Benny
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