Vue JSON Response Guide

Inquiry from a beginner.

My goal is to display the name of a city using props.

When I use {{ props.feed.location }} to fetch:

{ "latitude": 50.85, "longitude": 4.35, "name": "Brussels, Belgium", "id": 213633143 }

However, when I attempt {{ props.feed.location.name }} to explicitly print the city name, it triggers a JS error:

Error in render: "TypeError: Cannot read property 'name' of null"

found in

---> <VueInstagram>
       <Insta> at src/components/Insta.vue
         <Home> at src/views/Home.vue
           <App> at src/App.vue
             <Root>

Any suggestions? Thank you!!

Code

  <template v-slot:feeds="props" class="row">
      <div class="col-12">
        <li class="fancy-list card list-unstyled">
          <div class="innerinfo row">
            <div class="col-4">
              <a v-bind:href="props.feed.link">
                <img
                  class="img-fluid rounded"
                  v-bind:src="props.feed.images.standard_resolution.urlNOT"
                />
              </a>
            </div>

            <div class="col-8">
              <span class="likes row align-items-center">
                <font-awesome-icon
                  icon="heart"
                  class="mr-2"
                  :class="{ 'light-text': isDarkMode, 'dark-text': !isDarkMode }"
                />
                <h5
                  :class="{ 'light-text': isDarkMode, 'dark-text': !isDarkMode }"
                >{{ props.feed.likes.count }}</h5>
              </span>
              <span
                :class="{ 'light-text': isDarkMode, 'dark-text': !isDarkMode }"
              >{{ props.feed.location.name }}</span>
            </div>
          </div>
        </li>
      </div>
    </template>

Feed response:

  [Sample data here]

I aim to access the city within the location object. Everything else works fine such as links and likes, except for printing the city name specifically. However, printing just the location itself functions correctly.

Answer №1

It seems like the issue here is with an asynchronous request, which means that when you try to display location.name during rendering, the location data may not have loaded yet.

To resolve this, I suggest using a v-if statement so that the span will only render once props.feed has been loaded:

<span v-if="props.feed.location" 
     :class="{ 'light-text': isDarkMode, 'dark-text': !isDarkMode }"
>{{ props.feed.location.name }}</span>

If you need to display the span regardless of whether it's loaded or not, you can use a computed property instead:

<span :class="{ 'light-text': isDarkMode, 'dark-text': !isDarkMode }">locationName>

<script>
export default {
    computed: {
        locationName() {
            return props.feed && props.feed.location ? props.feed.location.name : "";
        }
    }
}  

Answer №2

Within the second element of the dataset, the location is identified as being null

As @depperm recommended, you have the option to utilize the following code snippet:

{{ props.feed.location ? props.feed.location.name : '' }}

Alternatively, my personal preference is:

<span v-if="props.feed && props.feed.location">
  {{ props.feed.location.name }}
</span>

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