Tips for accessing arrayList data within a loop in JavaScript and displaying it in an HTML <c: forEach> tag

Question

Tips for accessing arrayList data within a loop in JavaScript and displaying it in an HTML <c: forEach> tag

I have an array list stored inside a javascript code block. I am looking to extract this array list and iterate through it using the html tag <c:forEach>. How can I achieve this? Currently, I am able to display the array list using <h:outputText>, but now I want to loop through each element in the list. The structure of my array list in javascript looks like this:

<script>    
    topCategory = new Array();
    topCategory.push("one");
    topCategory.push("two");
    topCategory.push("threee");
    topCategory.push("four");
</script>

I aim to iterate over the topCategory array within an html tag <c:forEach>

For example:

<script>    
topCategory = new Array();
topCategory.push("one");
topCategory.push("two");
topCategory.push("threee");
topCategory.push("four");

After that, I will be looping through this list within a

<table width="100%">          
  <tr>
   <td rowspan="2" width="20%">
     <c:forEach items="#{topCategory}" var="cat">
       <p:commandButton value="#{cat}"/>
              </c:forEach>   
    </td>
  </tr>

javascript java arraylist

Answer 1

Answer №1

Apologies for the delayed response, but I hope this information proves helpful for you. It seems like you're looking to iterate through an array in JavaScript and display it as buttons within HTML. To achieve this, you can utilize document.createElement() and appendChild. Here's a sample code snippet:

function getButtonSet(topCategory){
    $('#renderList').empty();
    (function(){
         var t, tt;                        
         category.forEach(renderProductList);
         function renderProductList(element, index, arr) {
            var inputElement = document.createElement("input");                                    
            inputElement.setAttribute("type", "button");
            inputElement.setAttribute("value", element);
            inputElement.setAttribute("name", element);
            var foo = document.getElementById("renderList");
            foo.appendChild(inputElement);
            t = document.createTextNode(element);
          }
     }
}

Within your <td></td>, replace the

<c:forEach></c:forEach>

with

<div id="renderList" ></div>

.

Answer 2

Apologies for the delayed response, but I hope this information proves helpful for you. It seems like you're looking to iterate through an array in JavaScript and display it as buttons within HTML. To achieve this, you can utilize document.createElement() and appendChild. Here's a sample code snippet:

function getButtonSet(topCategory){
    $('#renderList').empty();
    (function(){
         var t, tt;                        
         category.forEach(renderProductList);
         function renderProductList(element, index, arr) {
            var inputElement = document.createElement("input");                                    
            inputElement.setAttribute("type", "button");
            inputElement.setAttribute("value", element);
            inputElement.setAttribute("name", element);
            var foo = document.getElementById("renderList");
            foo.appendChild(inputElement);
            t = document.createTextNode(element);
          }
     }
}

Within your <td></td>, replace the

<c:forEach></c:forEach>

with

<div id="renderList" ></div>

.

Answer 3

Answer №2

Ensure that your JSP file includes a <c:forEach> loop to iterate through the desired elements.

<script>
topCategory = new Array();
<c:forEach var="val" items="${list}">
topCategory.push("${val}");
</c:forEach>
</script>

This snippet will create the JavaScript code you see in the final HTML, using the data from the ArrayList supplied by your Java action handler. As a result, a JavaScript array will be formed in the user's browser.

Note: Keep in mind that this method only supports basic text values similar to the example provided. Any text with special characters should be properly encoded for JavaScript compatibility.

Answer 4

Ensure that your JSP file includes a <c:forEach> loop to iterate through the desired elements.

<script>
topCategory = new Array();
<c:forEach var="val" items="${list}">
topCategory.push("${val}");
</c:forEach>
</script>

This snippet will create the JavaScript code you see in the final HTML, using the data from the ArrayList supplied by your Java action handler. As a result, a JavaScript array will be formed in the user's browser.

Note: Keep in mind that this method only supports basic text values similar to the example provided. Any text with special characters should be properly encoded for JavaScript compatibility.

Answer 5

Answer №3

If you're looking to build your own list and loop through it while generating HTML on the server side, you can achieve that by using:

<c:set var="items" value="${["apple","banana"]}">

For more information, check out this link: Creating Array using JSTL or EL

Answer 6

If you're looking to build your own list and loop through it while generating HTML on the server side, you can achieve that by using:

<c:set var="items" value="${["apple","banana"]}">

For more information, check out this link: Creating Array using JSTL or EL

Answer 7

Answer №4

<script type='text/javascript' src='http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.3.0.js'> </script>
<script>


function AppViewModel()
{

topCategory = ko.observableArray([]);
    topCategory.push("one");
    topCategory.push("two");
    topCategory.push("threee");
    topCategory.push("four");
}


    
    
ko.applyBindings(AppViewModel);





</script>

<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<script type='text/javascript' src='http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.3.0.js'></script>

</head>

<body>
The content of the document......
<br>
<ul data-bind="foreach: topCategory">
    <li>
         <b data-bind="text: $data"></b>
    </li>
</ul>

you should definitely give this a try

Answer 8

<script type='text/javascript' src='http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.3.0.js'> </script>
<script>


function AppViewModel()
{

topCategory = ko.observableArray([]);
    topCategory.push("one");
    topCategory.push("two");
    topCategory.push("threee");
    topCategory.push("four");
}


    
    
ko.applyBindings(AppViewModel);





</script>

<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<script type='text/javascript' src='http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.3.0.js'></script>

</head>

<body>
The content of the document......
<br>
<ul data-bind="foreach: topCategory">
    <li>
         <b data-bind="text: $data"></b>
    </li>
</ul>

you should definitely give this a try

Tips for accessing arrayList data within a loop in JavaScript and displaying it in an HTML <c: forEach> tag

Answer №1

Answer №2

Answer №3

Answer №4

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