CODEWITHSUNDEEP
javascriptvue.js
sigmaxf
sigmaxf

Reputation: 8492

How to render an element conditionally in Vue.js?

I'm new to Vue.js, I just read the documentation on conditional rendering here (https://v2.vuejs.org/v2/guide/conditional.html) but somehow can't get it to work...

My code:

<button onclick="showTemplate()">Teste</button>


<template v-if="app">

    <div id="app">
      {{ message }}
    </div>

</template>

function showTemplate(){
    var app = new Vue({
      el: '#app',
      data: {
        message: 'Hello Vue!'
      }
    })
}

I want the template tag to render only after app has been instantiated. I have also tried variations of this code without success. Can someone help out?

Upvotes: 0

Views: 2305

Answers (2)

Bert
Bert

Reputation: 82489

Use v-cloak. The intended use of v-cloak is to hide the Vue until it is instantiated.

function showTemplate() {
  var app = new Vue({
    el: '#app',
    data: {
      message: 'Hello Vue!'
    }
  })
}
[v-cloak] {
  display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.4/vue.js"></script>
<button onclick="showTemplate()">Teste</button>

<div id="app" v-cloak>
  {{ message }}
</div>

Here is how you might hide your "loading" screen when data is retrieved. In this case, the button will serve as our loading screen.

var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!',
    loaded: false
  },
  methods: {
    getData() {
      setTimeout(() => this.loaded = true, 2000)
    }
  }
})
[v-cloak] {
  display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.4/vue.js"></script>

<div id="app" v-cloak>
  <button v-if="!loaded" @click="getData">Get Data</button>

  <div v-if="loaded">
    {{ message }}
  </div>
</div>

Upvotes: 2

Jrey
Jrey

Reputation: 1638

Try this and remove the button. You don't need to call the instance within the function.

// put it on your index.html
<div id="app">
  {{ message }}
</div>

// put it on your script make sure that you have already a CDN of vuejs.
var app = new Vue({
   el: '#app',
   data: {
      message: 'Hello Vue!'
   }
})

Upvotes: 0

Related Questions