JSFiddle - React, Tailwind, and code Playground

by rezaxdi

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.min.js"></script>
<div id="app">
  <v-style>
    .smooth-enter-to, .smooth-leave {
      height: {{computedHeight}};
    }
  </v-style>
  <h2>Todos:</h2>
    <input type="button" v-on:click="toggleCollapse" value="show/hide" />
  <transition name="smooth">
      <p ref="myText" v-show="show">
    Now it's smooth - getting closer to BS4 collapse, but now I need to know the exact height of each section at a particular screen size to set the max-height. Over-compensating max-width work ok, but is still a bit 'jerky'. Is there a way to calculate an elements height before starting the show/hide? If the max-height value is too small, elements overlap.
      </p>
 </transition>
  <ol>
    <li v-for="todo in todos">
      <label>
        <input type="checkbox"
          v-on:change="toggle(todo)"
          v-bind:checked="todo.done">

        <del v-if="todo.done">
          {{ todo.text }}
        </del>
        <span v-else>
          {{ todo.text }}
        </span>
      </label>
    </li>
  </ol>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

.smooth-enter-active, .smooth-leave-active {
  transition: height .5s;
  overflow: hidden;
}
.smooth-enter, .smooth-leave-to {
  height: 0;
}

JavaScript

Vue.component('v-style', {
  render: function (createElement) {
    return createElement('style', this.$slots.default)
  }
});

new Vue({
  el: "#app",
  data: {
   computedHeight: 'auto',
   show: false,
    todos: [
      { text: "Learn JavaScript", done: false },
      { text: "Learn Vue", done: false },
      { text: "Play around in JSFiddle", done: true },
      { text: "Build something awesome", done: true }
    ]
  },
  methods: {
  	toggle: function(todo){
    	todo.done = !todo.done
    },
    toggleCollapse: function() {
    	this.show = !this.show;
    },
    initHeight: function(){
    
      this.$refs['myText'].style.position = 'absolute';
      this.$refs['myText'].style.visibility = 'hidden';
      this.$refs['myText'].style.display = 'block';
    	      
      const height = getComputedStyle(this.$refs['myText']).height;      
      this.computedHeight= height;  
      
      this.$refs['myText'].style.position = null;
      this.$refs['myText'].style.visibility = null;
      this.$refs['myText'].style.display = 'none';
      
    }
  },
 	mounted: function(){
    this.initHeight()
 	}
})