Tips for preventing the parent element's height from fluctuating when displaying a child div using v-if

Question

Tips for preventing the parent element's height from fluctuating when displaying a child div using v-if

I have a main container and an inner container. The inner container is displayed using v-if. I want to include a transition effect on the inner element, but after the transition ends, the height of the parent container changes abruptly and looks unattractive.

I am looking for something similar to jQuery's slideToggle() function.

Below is the HTML in which I am applying a fade effect through a transition in opacity:

<div class="my-div">
    <p>some content</p>
    <transition name="fade" mode="out-in">
      <p key=1 v-if="show">hello</p>
    </transition>
  </div>

And here is the CSS for the transition:

.fade-enter-active,
.fade-leave-active {
  transition: opacity .5s;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
}

.my-div {
  background: lightgreen;
}

Here is the fiddle with my code:

https://jsfiddle.net/x15Lw6a3/

I have attempted to achieve a height transition by changing from opacity to height or max-height as suggested by other questions, but it results in a sudden snap up and down.

If you have any ideas or can point me to a tutorial, I would greatly appreciate it. Thank you!

css vue.js vuejs2 vue-component transition

Answer 1

Answer №1

One way to improve the smoothness of the animation is by utilizing the max-height property. Add max-height: 100px; to the

fade-enter-active,
.fade-leave-active

rule, and in the

.fade-enter,
.fade-leave-to

rule, set it to 0 as shown below:

Vue.config.devtools = false;
Vue.config.productionTip = false;

new Vue({
  el: '#demo',
  data: {
    show: true
  }
})

.fade-enter-active,
.fade-leave-active {
  transition: all 0.5s ease;
  max-height: 100px;
  opacity: 1;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
  max-height: 0px;
}

.my-div {
  background: lightgreen;
}

<script src="https://unpkg.com/vue/dist/vue.js"></script>

<div id="demo">
  <button v-on:click="show = !show">
    Toggle
  </button>
  <div class="my-div">
  <p>some content</p>
  <transition name="fade" mode="out-in">
    <p key=1 v-if="show" >hello</p>
  </transition>
  </div>
</div>

Note:

If you implement this change, you may notice an improvement in the smoothness of the animation.

Answer 2

One way to improve the smoothness of the animation is by utilizing the max-height property. Add max-height: 100px; to the

fade-enter-active,
.fade-leave-active

rule, and in the

.fade-enter,
.fade-leave-to

rule, set it to 0 as shown below:

Vue.config.devtools = false;
Vue.config.productionTip = false;

new Vue({
  el: '#demo',
  data: {
    show: true
  }
})

.fade-enter-active,
.fade-leave-active {
  transition: all 0.5s ease;
  max-height: 100px;
  opacity: 1;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
  max-height: 0px;
}

.my-div {
  background: lightgreen;
}

<script src="https://unpkg.com/vue/dist/vue.js"></script>

<div id="demo">
  <button v-on:click="show = !show">
    Toggle
  </button>
  <div class="my-div">
  <p>some content</p>
  <transition name="fade" mode="out-in">
    <p key=1 v-if="show" >hello</p>
  </transition>
  </div>
</div>

Note:

If you implement this change, you may notice an improvement in the smoothness of the animation.

Answer 3

Answer №2

After exploring various methods, I ultimately decided to utilize a component, and I found that VueSlideToggle worked perfectly for my needs. It incorporates CSS transitions that target the height property.

new Vue({
  el: '#demo',

  data() {
    return {
      show: true
    }
  }
});

.my-div {
  background: lightgreen;
}

<div id="demo">
  <button v-on:click="show = !show">Toggle</button>

  <div class="my-div">
    <p>some content</p>

    <vue-slide-toggle :open="show" tag="div" :duration="500">
      <p v-if="show">hello</p>
    </vue-slide-toggle>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://unpkg.com/vue-slide-toggle"></script>

Answer 4

After exploring various methods, I ultimately decided to utilize a component, and I found that VueSlideToggle worked perfectly for my needs. It incorporates CSS transitions that target the height property.

new Vue({
  el: '#demo',

  data() {
    return {
      show: true
    }
  }
});

.my-div {
  background: lightgreen;
}

<div id="demo">
  <button v-on:click="show = !show">Toggle</button>

  <div class="my-div">
    <p>some content</p>

    <vue-slide-toggle :open="show" tag="div" :duration="500">
      <p v-if="show">hello</p>
    </vue-slide-toggle>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://unpkg.com/vue-slide-toggle"></script>

Tips for preventing the parent element's height from fluctuating when displaying a child div using v-if

Answer №1

Answer №2

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