How can I display an array of strings of an object as spans in a JS template literal?

Question

I have an array of objects. In each object there is a key with a value of an array of strings (the number of strings changes in each object). How can I display each string of the array as <span> in a JS template literal?

If the array contains 2 strings, than 2 <span> should appear, If 3 strings, 3 <span> etc.

Code:

let items = [{
  "id": 1,
  "name": "item 1",
  "captionTags": ["Stills", "Animation", "Virtual Reality"]
},
{
  "id": 2,
  "name": "item 2",
  "captionTags": ["Configurator", "Animation", "Application"]
},
{
  "id": 3,
  "name": "item 3",
  "captionTags": ["Stills", "Configurator"]
}];

function displayItems() {
  let itemsContainer = document.querySelector('.items-container');
  itemsContainer.innerHTML = '';
  items.forEach(item => {

    itemsContainer.innerHTML += `
        <div class="items-wrapper">
        <div class="item-caption">
            <span class="item-caption-col">
                <h3>${item.name}</h3>
                <span class="item-caption-tags">
                I WANT TO DISPLAY HERE EACH ELEMENT OF CAPTION TAGS ARRAY IN EACH OBJECT 
               AS SPANS 
                </span>
            </span>
        </div>
    </div>`
  });
};


displayItems();

Thank you in advance for your help!

Just iterate through item.captionTags, wrap the strings in <span> and append them? — Terry
– Terry, Commented Aug 20, 2021 at 12:04

Andy · Accepted Answer · 2021-08-20 12:13:22Z

3

map over the items, and map over the tags returning string literals. But because map returns a new array just make sure you join it up into a string at the end.

const items=[{id:1,name:"item 1",captionTags:["Stills","Animation","Virtual Reality"]},{id:2,name:"item 2",captionTags:["Configurator","Animation","Application"]},{id:3,name:"item 3",captionTags:["Stills","Configurator"]}];

function displayItems(items) {
  return items.map(item => {
    const captions = item.captionTags.map(tag => `<span>${tag}</span>`).join('');
    return (
      `<h3>${item.name}</h3><div>${captions}</div>`
    );
  }).join('');
}

document.querySelector('div').innerHTML = displayItems(items);

<div />

answered Aug 20, 2021 at 12:13

Andy

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Comments

jiali · Accepted Answer · 2021-08-20 12:29:19Z

Try this:

let items = [{
        "id": 1,
        "name": "item 1",
        "captionTags": ["Stills", "Animation", "Virtual Reality"]
    },
    {
        "id": 2,
        "name": "item 2",
        "captionTags": ["Configurator", "Animation", "Application"]
    },
    {
        "id": 3,
        "name": "item 3",
        "captionTags": ["Stills", "Configurator"]
    }];

function displayItems() {
    let itemsContainer = document.querySelector('.items-container');
    itemsContainer.innerHTML = '';
    items.forEach(item => {

        itemsContainer.innerHTML += `
        <div class="items-wrapper">
        <div class="item-caption">
            <span class="item-caption-col">
                <h3>${item.name}</h3>
                `;
                item.captionTags.forEach(tag => {
                  itemsContainer.innerHTML +=`<span class="item-caption-tags"> ${tag} </span>`
                })
               itemsContainer.innerHTML +=`
            </span>
        </div>
    </div>`
    });
};


displayItems();

span.item-caption-tags {
  border: 1px solid black
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="items-container" > </div>

css is for example only

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