Call file js containing variable java, from html5

Question

Call file js containing variable java, from html5

Navigation

#1 by (0 votes)

0

I have a JS function embedded in my website, at the end of body

<script>
function permisosMenu() {
  var cadena = <%=permisos%>
  if(!cadena.includes(1) && !cadena.includes(2) && !cadena.includes(3) && !cadena.includes(4))
        document.getElementById("bloque1").style.display ="none";

  if(!cadena.includes(5) && !cadena.includes(6) && !cadena.includes(7) && !cadena.includes(8) &&
          !cadena.includes(9) && !cadena.includes(10) && !cadena.includes(11) && !cadena.includes(12) &&
          !cadena.includes(13) && !cadena.includes(14) && !cadena.includes(15) && !cadena.includes(16))
        document.getElementById("bloque2").style.display ="none";

  if(!cadena.includes(6) && !cadena.includes(7) && !cadena.includes(8) && !cadena.includes(9) 
          && !cadena.includes(10) && !cadena.includes(11) && !cadena.includes(12))
        document.getElementById("bloque2_op2").style.display ="none";

  if(!cadena.includes(17) && !cadena.includes(18) && !cadena.includes(19) && !cadena.includes(20) )
        document.getElementById("bloque3").style.display ="none";

  if(!cadena.includes(21) && !cadena.includes(22) && !cadena.includes(23))
        document.getElementById("bloque4").style.display ="none";

  if(!cadena.includes(24) && !cadena.includes(25))
        document.getElementById("bloque5").style.display ="none";

  for (var i = 1; i <= 32; i++) {
      if(!cadena.includes(i)){
        document.getElementById("op"+i).style.display ="none";
    }
}
}
</script>

This code complies with what I need, the string variable will get its value of (which is at the beginning of the document before the body)

<%
String permisos= (String)session.getAttribute("permisos");
%>

When it is directly placed in the html it works correctly, when I want to put it in a separate .js file, and then call it with

<script source="ruta.."></script>

It does not work for me, maybe the scriplest <% = permissions > Is it what you can not call in my htlm?

java javascript

asked by angelo1793 07.09.2018 в 18:51

source

1 answer

How can I predefine a data in a form (java Web)? Problem with laravel Authentication 5.6

score 0 · Accepted Answer

That's right, the js file will include it in the browser (leaving the java server environment) so you could not get java functions out of the jsp context, what I recommend is to save your permissions in a hidden input and read it from javascript, or just make an ajax call to a jsp that returns a json with the permissions you have.

leaving something like that in the body

<input id="permisos" type="hidden" value="<%=permisos%>">

and in Javascript using jquery

var cadena = $('#permisos').val();