How to access session variable from JavaScript file (.js) file?

Question

I have to access session variable from javascript file

I am using below code to access from javascript,

var sessionValue = '<%=Session["username"]%>'
            alert(sessionValue)

it is working well when the script function is placed inside the aspx page...but when I use the same code in .js file it is not working

I have seen all the related answers, nothing is useful for me, so don't mark it as duplicate

because Session is not available in .js file. It can be access from your apsx page only. — Yagnesh Agola
– Yagnesh Agola, Commented Dec 27, 2013 at 13:30
@Shahe actually you could write an HTTPHandler which will dynamically write the .js file — geedubb
– geedubb, Commented Dec 27, 2013 at 13:31

semirturgay · Accepted Answer · 2013-12-27 13:31:54Z

1

i think try to write your session value to a hidden html element and read value of this hidden element with javascript as follow :

<input type="hidden" id="session" value="'<%=Session["username"]%>'">

at your js:

var sessionValue =document.getElementById("session").value;

answered Dec 27, 2013 at 13:31

semirturgay

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2 Comments

This is bad practice. Write that value into a JS variable instead to avoid polluting the DOM and the tree traversing to get the value.

why it is bad practice can you explain it

WebServer · Accepted Answer · 2013-12-27 13:34:26Z

1

Depends on what is your scripting languauge in server side, if it is JSP or PHP following should work.

var sessionValue = "'"+<%=Session["username"]%>+"'"
alert(sessionValue)

answered Dec 27, 2013 at 13:34

WebServer

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Scripting language is aspx(Asp.net), already mention in question.