I've been doing some vuejs for almost a year now and I never really got animations and transitions to work, it seems very unclear to me how all this is supposed to work and today I decided to try and finally understand them but once again I am stuck, the transition simply won't work and I don't understand what I'm doing wrong. Here is my code:
The HTML
<div id="app">
<div class="row">
<div class="container-fluid">
<transition-group name="flip-list" tag="div" class="row horizontal-scroll">
<div class="col-xs-12 col-md-2 col-lg-2 col-card"
v-for="(someCard, index) in someCards" v-bind:key="index">
<div class="some-card" @click="changeOrder(someCard)">
{{ someCard.someTitle }}
</div>
</div>
</transition-group>
</div>
</div>
</div>
The JS
new Vue({
el: "#app",
data: {
someCards: [
{
order: 2,
someTitle: 'Title 1'
},
{
order: 2,
someTitle: 'Title 2'
},
{
order: 2,
someTitle: 'Title 3'
},
{
order: 3,
someTitle: 'Title 4'
},
{
order: 3,
someTitle: 'Title 5'
},
{
order: 1,
someTitle: 'Title 6'
},
{
order: 1,
someTitle: 'Title 7'
},
{
order: 1,
someTitle: 'Title 8'
},
{
order: 3,
someTitle: 'Title 1'
}
]
},
methods: {
changeOrder(someCardData) {
let newRandom = Math.floor(Math.random() * 3) + 1;
while (newRandom === someCardData.order) {
newRandom = Math.floor(Math.random() * 3) + 1;
}
someCardData.order = newRandom;
this.reorderList();
},
reorderList() {
this.someCards.sort(function(objA, objB) {
return objA.order - objB.order;
})
},
}
})
The CSS
/* default */
body {
background: #20262E;
padding: 20px;
font-family: Helvetica;
}
#app {
background: #fff;
border-radius: 4px;
padding: 20px;
transition: all 0.2s;
}
/* bootstrap */
.row {
display: -ms-flexbox;
display: flex;
-ms-flex-wrap: wrap;
flex-wrap: wrap;
margin-right: -15px;
margin-left: -15px;
}
.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12, .col, .col-auto, .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12, .col-sm, .col-sm-auto, .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12, .col-md, .col-md-auto, .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12, .col-lg, .col-lg-auto, .col-xl-1, .col-xl-2, .col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12, .col-xl, .col-xl-auto {
position: relative;
width: 100%;
min-height: 1px;
padding-right: 15px;
padding-left: 15px;
}
/* my css */
.horizontal-scroll {
overflow-x: auto;
-ms-flex-wrap: nowrap;
flex-wrap: nowrap;
}
.col-card {
max-width: 14%;
}
.some-card {
height: 220px;
font-size: 16px;
text-align: center;
padding-right: 5px;
margin-top: 5px;
-webkit-box-shadow: 1px 1px 5px rgba(0,0,0,.1);
box-shadow: 1px 1px 5px rgba(0,0,0,.1);
border-radius: 2px;
background: #fff;
margin-bottom: 20px;
position: relative;
border-top-style: solid;
}
.flip-list-move {
transition: transform 1s;
}
https://jsfiddle.net/eywraw8t/459088/
I am trying to have an animation triggered when I reorder a card in a list of cards aligned in a row. To change the position of a card, simply click on it. The reorder works but no transition is done.
I used this documentation https://v2.vuejs.org/v2/guide/transitions.html#List-Move-Transitions and have seen a couple of fairly easy tutorials but I must be missing something. Can someone please check the code out and tell me what it is ?
Thanks
It's because you're using the index as a key. The index will always be the same for the same position even if the card changes. I'd give each card a unique id and then use that as a key instead ..
new Vue({
el: "#app",
data: {
someCards: [{
id: 0,
order: 2,
someTitle: 'Title 1'
},
{
id: 1,
order: 2,
someTitle: 'Title 2'
},
{
id: 2,
order: 2,
someTitle: 'Title 3'
},
{
id: 3,
order: 3,
someTitle: 'Title 4'
},
{
id: 4,
order: 3,
someTitle: 'Title 5'
},
{
id: 5,
order: 1,
someTitle: 'Title 6'
},
{
id: 6,
order: 1,
someTitle: 'Title 7'
},
{
id: 7,
order: 1,
someTitle: 'Title 8'
},
{
id: 8,
order: 3,
someTitle: 'Title 1'
}
]
},
methods: {
changeOrder(someCardData) {
let newRandom = Math.floor(Math.random() * 3) + 1;
while (newRandom === someCardData.order) {
newRandom = Math.floor(Math.random() * 3) + 1;
}
someCardData.order = newRandom;
this.reorderList();
},
reorderList() {
this.someCards.sort(function(objA, objB) {
return objA.order - objB.order;
})
},
}
})/* default */
body {
background: #20262E;
padding: 20px;
font-family: Helvetica;
}
#app {
background: #fff;
border-radius: 4px;
padding: 20px;
transition: all 0.2s;
}
/* bootstrap */
.row {
display: -ms-flexbox;
display: flex;
-ms-flex-wrap: wrap;
flex-wrap: wrap;
margin-right: -15px;
margin-left: -15px;
}
.col-1,
.col-2,
.col-3,
.col-4,
.col-5,
.col-6,
.col-7,
.col-8,
.col-9,
.col-10,
.col-11,
.col-12,
.col,
.col-auto,
.col-sm-1,
.col-sm-2,
.col-sm-3,
.col-sm-4,
.col-sm-5,
.col-sm-6,
.col-sm-7,
.col-sm-8,
.col-sm-9,
.col-sm-10,
.col-sm-11,
.col-sm-12,
.col-sm,
.col-sm-auto,
.col-md-1,
.col-md-2,
.col-md-3,
.col-md-4,
.col-md-5,
.col-md-6,
.col-md-7,
.col-md-8,
.col-md-9,
.col-md-10,
.col-md-11,
.col-md-12,
.col-md,
.col-md-auto,
.col-lg-1,
.col-lg-2,
.col-lg-3,
.col-lg-4,
.col-lg-5,
.col-lg-6,
.col-lg-7,
.col-lg-8,
.col-lg-9,
.col-lg-10,
.col-lg-11,
.col-lg-12,
.col-lg,
.col-lg-auto,
.col-xl-1,
.col-xl-2,
.col-xl-3,
.col-xl-4,
.col-xl-5,
.col-xl-6,
.col-xl-7,
.col-xl-8,
.col-xl-9,
.col-xl-10,
.col-xl-11,
.col-xl-12,
.col-xl,
.col-xl-auto {
position: relative;
width: 100%;
min-height: 1px;
padding-right: 15px;
padding-left: 15px;
}
/* my css */
.horizontal-scroll {
overflow-x: auto;
-ms-flex-wrap: nowrap;
flex-wrap: nowrap;
}
.col-card {
max-width: 14%;
}
.some-card {
height: 220px;
font-size: 16px;
text-align: center;
padding-right: 5px;
margin-top: 5px;
-webkit-box-shadow: 1px 1px 5px rgba(0, 0, 0, .1);
box-shadow: 1px 1px 5px rgba(0, 0, 0, .1);
border-radius: 2px;
background: #fff;
margin-bottom: 20px;
position: relative;
border-top-style: solid;
}
.flip-list-move {
transition: transform 1s;
}<script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
<div id="app">
<div class="row">
<div class="container-fluid">
<transition-group name="flip-list" tag="div" class="row horizontal-scroll">
<div class="col-xs-12 col-md-2 col-lg-2 col-card" v-for="(someCard, index) in someCards" v-bind:key="someCard.id">
<div class="some-card" @click="changeOrder(someCard)">
{{ someCard.someTitle }}
</div>
</div>
</transition-group>
</div>
</div>
</div>