Set view variables in ExpressJS from JavaScript

Question

Let's say I pass a variable myvar from my router to the view-

app.get('/test', function(req, res) {
    res.render('testPage', {
        myVar: true
    });
}

Now I can use this variable in the view within script tag like this -

<script>
  var myVar = <%- JSON.stringify(myVar) %>;
  console.log(myVar); // prints 'true'
</script>

What I want to do is reset the view variable myVar to false however that isn't happening.

<script>
  var myVarJS = <%- JSON.stringify(myVar) %>;
  console.log(myVarJS); // prints 'true'
  <%- myVar = false %>;
  myVarJS = <%- JSON.stringify(myVar) %>;
  console.log(myVarJS); // still prints 'true'
</script>

The scenario is that one can pass view variables from the router with a value. Now I would like to change the value of that variable from my client side javascript.

The templating engine for views that I am using is EJS.

whats the scenario? Can't you create new variable based on myVar? can you please tell us the use case? — Deendayal Garg
– Deendayal Garg, Commented Mar 31, 2016 at 5:35
@DeendayalGarg i have edited the last code snippet in my question. — rnjai
– rnjai, Commented Mar 31, 2016 at 5:37
@DeendayalGarg the scenario is that you can pass view variables from the router with a value.Now i would like to change the value of that variable from my client side javascript.Any more questions? — rnjai
– rnjai, Commented Mar 31, 2016 at 5:38
@rnjai you are not trying to change the value from your client side javascript, you are trying to change the value while parsing your template. The question still remains. Why? — trex005
– trex005, Commented Mar 31, 2016 at 5:41
@trex005 it is a bit too complex too explain.What i want to do is - " the scenario is that you can pass view variables from the router with a value.Now i would like to change the value of that variable from my client side javascript." — rnjai
– rnjai, Commented Mar 31, 2016 at 5:46

trex005 · Accepted Answer · 2016-03-31 06:06:00Z

1

Change <%- myVar = false %>; to <% myVar = false %>;

answered Mar 31, 2016 at 6:06

trex005

5,1354 gold badges32 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Set view variables in ExpressJS from JavaScript

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related