Question

I’m a beginner with Json, I follow this tutorial
the example I have written is based on the tutorial, but I do not understand it does not work :

<script language="javascript">
var Jtext="{"variables":["var1","var2","var3"]}";
var Jobj=eval("(" + Jtext + ")");
var j=Jobj["variables"];
document.write(j[0]);
</script>

Any helps…

Answer 1

Remove the evil eval and the double quotes on that JSON Obj.

<script>
    var obj={"variables":["var1","var2","var3"]};
    var j=obj["variables"];
    document.write(j[0]);
</script>

What’s wrong in Your example:

var Jtext="{"variables":["var1","var2","var3"]}";

This doesn’t work. variables, var1, var2, … are out of the string, like the syntax highlight shows us here. That leads to a Uncaught SyntaxError: Unexpected identifier.