utilizing vue model attributes with `${}`

I am encountering an issue with my code. Initially, :src="labels[index]" was working fine for me. However, as my codebase expanded, I needed to use ${app.labels[index]}. Simply using ${app.labels} works, but the addition of [index] causes it to break. Can someone guide me on how to correctly add that inside the brackets?

new Vue({
  el: "#app",
  data: {
    images: [],
        labels: [],
          form: {
            dir: "",
            fileItems: [] // An array containing objects of type: {id: number, file: File, dataUrl: [base64 encoded file string], caption: string'}
          },
  },
  methods: {
    toggle: function(todo){
        todo.done = !todo.done
    }
  }
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <h2>Todos:</h2>
      <div class="image-wrap"><img style="max-height: 430px;" :src="${app.labels[index]}" /></div>
</div>

Answer №1

When working with Vue and utilizing the symbol : in a prop, you are essentially instructing Vue to interpret it as JavaScript code.

This means that any expression containing : will be processed as JavaScript

For example:

<super-aweosme-component :a="1 + 1" />

In this case, the prop a would evaluate to 2 since it was treated as JavaScript.

On the other hand, if you omit the : in a component prop, Vue will treat it as plain text.

This indicates that the value should be taken as a literal string

For instance:

<super-aweosme-component a="1 + 1" />

Here, the prop a will be exactly 1 + 1 (as a string). Therefore, you can change

:src="${images.labels[index]}"
to simply
:src="images.labels[index]"
(making sure to implement the aforementioned adjustments)

Additional Information

If you encounter app.labels[index], note that app is not part of the template context. In this context, you have access to variables such as images, labels, and form (other attributes may also be present but are irrelevant for this discussion).

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