Apply v-focus to the first input field on a page - vue.js

Question

I've a Vue component in which I'm trying to autofocus the first field using v-focus. But my problem is, I've dynamic components that will be included at the top of the page. So in that case how can I apply autofocus to dynamically included component?

Answer 1

They key is to set ref on all your inputs to the same string like this:
<input type="text" ref="myInputs"/>
Then you will have access to an array called this.$refs.myInputs inside an event handler.
So you just need to do
this.$refs.myInputs[0].focus();
new Vue({
el: "#app",
mounted() {
this.$refs.myInputs[0].focus();
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"></script>
<div id="app">
<div>
<div v-for="index in 3" :key="index">
<input ref="myInputs" type="text" />
</div>
</div>
</div>

Answer 2

It's hard to tell how you're adding the input(s) to the DOM, without any pseudo code from you, but this is one way to do it..
[CodePen mirror]
new Vue({
el: "#app",
data: {
inputs: ["firstName", "lastName"]
},
watch: {
inputs() {
this.$nextTick(() => {
this.focusFirstInput();
});
}
},
methods: {
focusFirstInput() {
let first = this.inputs[0];
let firstInput = this.$refs[first][0];
firstInput.focus();
},
handleClick() {
this.inputs.push("newInput");
}
},
mounted() {
this.focusFirstInput();
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"></script>
<div id="app">
<div>
<div v-for="(input, index) in inputs" :key="index">
<input :ref="input" type="text" />
</div>
<div>
<button type="button" #click="handleClick">Click to add input</button>
</div>
</div>
</div>

Answer 3

I found this answer on Laracast and it worked for me. All I did was insert the code below in my dynamic form field.
this.$nextTick(() => {
let index = this.items.length - 1;
let input = this.$refs.title[index];
input.focus();
});
HTML
<div id="app">
<ul v-for="item in items">
<li>
<input :ref="'title'" v-model="item.title">
</li>
</ul>
<button v-on:click="addItem">Add Item</button>
</div>
JS
let app = new Vue({
el: '#app',
data: {
items: [
{title: 'Apple'},
{title: 'Orange'},
]
},
methods: {
addItem(){
this.items.push({title: "Pineapple"});
this.$nextTick(() => {
let index = this.items.length - 1;
let input = this.$refs.title[index];
input.focus();
});
}
}
});
Note: make sure to add :ref="'title'" into your dynamic form field.
Credits to the original author of the solution.