How to combine JS and ASP ?

[leifoet]

I am trying to check if a day (of a date) is odd or even - with the code below.
If I use the variable var_day instead of a number, nothing happens.
Look for a solution
Thanks.

<%
var_day = Day(date())
%>

<p id="demo"></p>
<script>
{
 var d = "";
 d = d + Number.isInteger(var_day); 
document.getElementById("demo").innerHTML = d;
}
</script>

 

[MarkSweetland]

var_day in your example exists on the server. JavaScript lives on the client. You'll have to inject your server value into a JavaScript variable in order for the client to see it.

<p id="demo"></p>
<script>
{
var var_day = '<%=Day(date())%>';
var d = "";
d = d + Number.isInteger(var_day);
document.getElementById("demo").innerHTML = d;
}
</script>


Mark

"You guys pair up in groups of three, then line up in a circle."
- Bill Peterson, a Florida State football coach

 

[leifoet]

<p id="demo"></p>
<script>
{
var var_day = '<%=Day(date())%>';
var d = "";
d = d + Number.isInteger(var_day);
document.getElementById("demo").innerHTML = d;
}
</script>

The result of this code is 'false' => should be 'true' ?

 

[feherke]

Hi

The result of this code is 'false' => should be 'true' ?

Well, there are single quotes ( ' ) in the JavaScript code around whatever the ASP would ever produce :

[b]var[/b] var_day = [green][i]'<%=Day(date())%>'[/i][/green][teal];[/teal]

[gray]  ||
  \/[/gray]

[b]var[/b] var_day = [green][i]'28'[/i][/green][teal];[/teal]

Ask your browser in it's console, how it sees such value :

[gray]13:20:39.348[/gray] >> [purple]Number[/purple].[green]isInteger[/green]([navy]28[/navy])
[gray]13:20:39.366[/gray] [gray]<-[/gray] [green]true[/green]
[gray]13:20:42.246[/gray] >> [purple]Number[/purple].[green]isInteger[/green]([navy]'28'[/navy])
[gray]13:20:42.261[/gray] [gray]<-[/gray] [green]false[/green]

Feherke.
feherke.github.io

 

[leifoet]

Thanks feherke for the solution: without quotes.
BTW: how could I test that in the browser - a little explanation?

 

[feherke]

Hi

I mean your browser's console from the developer tools. The one you can access like these
[pre]┌─────────┬──────────────────────────────┬──────────────┬─────────────┐
│ Browser │ Command │ Hotkey to │ Alternative │
│ │ │ the command │ hotkey │
├─────────┼──────────────────────────────┼──────────────┼─────────────┤
│ Firefox │ Web Developer | Toggle Tools │ Ctrl-Shift-I │ F12 │
│ Chrome │ More tools | Developer tools │ Ctrl-Shift-I │ F12 │
│ Opera │ │ Ctrl-Shift-I │ │
│ Vivaldi │ Developer Tools │ Ctrl-Shift-I │ │
└─────────┴──────────────────────────────┴──────────────┴─────────────┘[/pre]
Then in the tools panel select the Console tab.

You type the JavaScript expression you are working on ( the part after the "[tt]>>[/tt]" in my previous post ) and after pressing Enter is evaluated ( the part after the "[tt][gray]<-[/gray][/tt]" in my previous post ). Such JavaScript code gets evaluated in the current page's context, so you can access and even manipulate the document, to better understand what happens.

Feherke.
feherke.github.io