VisualForce - conditional html tags

Question

I am trying to apply a different style to the first element in a list.

I am currently attempting to use a counter to apply the li with a class only when cnt==0 but I cannot include < > brackets in an OutputText tag. Is there any way to escape the brackets or insert the class into an <li> tag using a condition?

I know this could be done after the fact using JavaScript but I'd rather avoid it.

<apex:variable var="cnt" value="{!0}" /> 
<apex:repeat value="{!items}" var="item" >
    <!-- only render the class if it is the first element -->
    <apex:OutputText value="<li class="activeLI">" rendered="{!cnt==0}" />
    <apex:OutputText value="<li>" rendered="{!cnt!=0}" />        

        <img src="{!$Resource[item.Image__c]}" width="85" height="90"/>
    </li>
    <apex:variable var="cnt" value="{!cnt+1}"/>
</apex:repeat>

manubkk · Accepted Answer · 2012-04-29 16:16:59Z

5

Visualforce is strict, every element must have an opening and closing tag or must be self-closing. When compiled, Visualforce will complain as it will only see the closing "li" tag and not the conditional opening "li" tag, one solution is to make the class name a variable as follows:

<apex:variable var="cnt" value="{!0}" />
<apex:variable var="class" value=""/>
<apex:repeat value="{!items}" var="item" >
  <apex:variable var="class" value="activeLI" rendered="{!cnt==0}"/>
  <apex:variable var="class" value="" rendered="{!cnt!=0}"/>
    <li class="{!class}">
      ...
    </li>
  <apex:variable var="cnt" value="{!cnt+1}"/> 
</apex:repeat>

answered Apr 29, 2012 at 16:16

manubkk

1,50813 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

UserIsStuck Over a year ago

Great idea! I made a small modification by removing the counter all-together, setting class to activeLI when defining it then emptying the value after it is used the first time. Many thanks for the idea.

manubkk Over a year ago

Thanks, and nice improvement there!

Acuariano · Accepted Answer · 2012-05-02 16:36:47Z

1

Have you consider using a CSS selector? Here's an example on how to style the first element of a list.

<style>
ul.myList > li:first-child {color : red}
</style>

<ul class="myList">
  <li>this is red</li>
  <li>this has default formatting</li>
</ul>

answered May 2, 2012 at 16:36

Acuariano

4983 silver badges11 bronze badges

Comments

danieljimenez · Accepted Answer · 2012-04-29 15:42:06Z

0

Have you considered using <apex:dataList>? I think it may accomplish what you're looking to do.

answered Apr 29, 2012 at 15:42

danieljimenez

1,4304 gold badges19 silver badges26 bronze badges

Collectives™ on Stack Overflow

VisualForce - conditional html tags

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related