将变量从.jsp页面传递到.js

Question

I am working on a .jsp page where depending on what header comes from a request it appears a different div from a .js file I add a second header and I would like

if (info.getLightHeader()!=null)

the

<div id="lightHeader" class="juices">

to appear(the code will be at the .js file)

Is this possible to be?Thank you in advance

Answer 1

You can use the jsp script tags inside javascript:

<%
String paramLightHeader = "";

if (info.getLightHeader()!=null){

  paramLightHeader=info.getLightHeader();
}
%>

use the variable in javascript:

Update: as per your provide code you need this:

<input type="hidden" name="lightParamHeader" value='<%= paramLightHeader %>' >
        <c:out value="${lightParamHeader}" />

Answer 2

Instead of having a separated .js file, you could have a .jsp file with javascript tags.

scripts.jsp

<script type="text/javascript">
   var foo = '<%= "Hi" %>'
</script>

Answer 3

您可以在JSP页面上声明一个JavaScript变量，该变量可以在所有js文件中使用，并且可以使用表达式语言传递该值。