The Vue property or method is unrecognized when utilizing the non-minified version

Question

The Vue property or method is unrecognized when utilizing the non-minified version

When I attempted to display the name 'John' using an inline template in a simple Vue example, I encountered the following error message:

[Vue warn]: Property or method "name" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

Surprisingly, when I switched to the minified version of Vue:

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="afd9dacaef9d8199819d">[email protected]</a>/dist/vue.min.js"></script>

The code successfully displayed 'John' without any errors. Could this be a bug or am I overlooking something in my use of Vue?

Vue.component('profilecontent', {});

var content = new Vue({
  el: '#profile-content-wrapper',
  data: {
    name: "John",
  }
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8dfbf8e8cdbfa3bba3bf">[email protected]</a>/dist/vue.js"></script>

<!-- Minify version works
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6e181b0b2e5c4058405c">[email protected]</a>/dist/vue.min.js"></script>
-->

<div id="profile-content-wrapper">
  <profilecontent inline-template>
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

javascript vue.js vuejs2 vue-component

Answer 1

Answer №1

Switching to the minified version of Vue did not solve the bug, but rather masked potential warnings that the unminified version would have shown when incorrect actions are performed.

Your usage of inline-template is causing Vue to search for the name variable within the profilecontent component instead of the main app. To avoid this, it is recommended to pass name as a prop to the component in order to eliminate the warning, even in development mode:

Vue.component('profilecontent', {props: ['name']});

var content = new Vue({
  el: '#profile-content-wrapper',
  data: {
    name: "John",
  }
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0177746441332f372f33">[email protected]</a>/dist/vue.js"></script>

<div id="profile-content-wrapper">
  <profilecontent inline-template :name="name">
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

(However, it remains unclear why the name variable is still accessible by the component when warnings are suppressed; typically, variables inside an inline-template should belong to the component, not its parent.)

Answer 2

Switching to the minified version of Vue did not solve the bug, but rather masked potential warnings that the unminified version would have shown when incorrect actions are performed.

Your usage of inline-template is causing Vue to search for the name variable within the profilecontent component instead of the main app. To avoid this, it is recommended to pass name as a prop to the component in order to eliminate the warning, even in development mode:

Vue.component('profilecontent', {props: ['name']});

var content = new Vue({
  el: '#profile-content-wrapper',
  data: {
    name: "John",
  }
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0177746441332f372f33">[email protected]</a>/dist/vue.js"></script>

<div id="profile-content-wrapper">
  <profilecontent inline-template :name="name">
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

(However, it remains unclear why the name variable is still accessible by the component when warnings are suppressed; typically, variables inside an inline-template should belong to the component, not its parent.)

Answer 3

Answer №2

One way to assemble your component is by utilizing <slot></slot>, allowing you to place other elements inside it as demonstrated below:

Vue.component('profilecontent', {
  template: `<h1><slot></slot></h1>`
});

var content = new Vue({
  el: '#profile-content-wrapper',
  data() {
    return {
      name: "John",
    }
  }
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="96e0e3f3d6a4b8a0b8a4">[email protected]</a>/dist/vue.js"></script>

<!-- Minify version works
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8cfaf9e9ccbea2baa2be">[email protected]</a>/dist/vue.min.js"></script>
-->

<div id="profile-content-wrapper">
  <profilecontent>
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

If you are working with an inline template, you can include the name property in the data object of the component like this:

Vue.component('profilecontent', {
   data() {
    return {
      name: "John",
    }
  }
});

var content = new Vue({
  el: '#profile-content-wrapper',
 
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4036352500726e766e72">[email protected]</a>/dist/vue.js"></script>

<!-- Minify version works
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a8deddcde89a869e869a">[email protected]</a>/dist/vue.min.js"></script>
-->

<div id="profile-content-wrapper">
  <profilecontent inline-template>
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

Answer 4

One way to assemble your component is by utilizing <slot></slot>, allowing you to place other elements inside it as demonstrated below:

Vue.component('profilecontent', {
  template: `<h1><slot></slot></h1>`
});

var content = new Vue({
  el: '#profile-content-wrapper',
  data() {
    return {
      name: "John",
    }
  }
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="96e0e3f3d6a4b8a0b8a4">[email protected]</a>/dist/vue.js"></script>

<!-- Minify version works
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8cfaf9e9ccbea2baa2be">[email protected]</a>/dist/vue.min.js"></script>
-->

<div id="profile-content-wrapper">
  <profilecontent>
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

If you are working with an inline template, you can include the name property in the data object of the component like this:

Vue.component('profilecontent', {
   data() {
    return {
      name: "John",
    }
  }
});

var content = new Vue({
  el: '#profile-content-wrapper',
 
})

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4036352500726e766e72">[email protected]</a>/dist/vue.js"></script>

<!-- Minify version works
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a8deddcde89a869e869a">[email protected]</a>/dist/vue.min.js"></script>
-->

<div id="profile-content-wrapper">
  <profilecontent inline-template>
    <div>
      <div>{{name}}</div>
    </div>
  </profilecontent>
</div>

The Vue property or method is unrecognized when utilizing the non-minified version

Answer №1

Answer №2

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