I'm facing an issue with my code and getting a warning in the console. Can anyone help me understand how to eliminate this warning?
[Vue tip]:
: component lists rendered with v-for should have explicit keys. See https://v2.vuejs.org/v2/guide/list.html#key for more info.<todo-item v-for="todoItem in todos">
(found in<Root>)
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Vue Tutorial</title>
<link rel="shortcut icon" href="https://vuejs.org/images/logo.png">
<script src="scripts/vue.js"></script>
</head>
<body>
<section id="app">
<p>{{ msg }}</p>
<p v-bind:title="message">
Hover your mouse over me for a few seconds to see my dynamically bound title!
</p>
<div>
<p v-if="seen">This text will show or hide if the button was clicked.</p>
<button type="button" v-on:click="isSeen">{{ isSeenText }}</button>
</div>
<ol>
<li v-for="todo in todos">
{{ todo.text }}
</li>
</ol>
<p>Total count: {{ todos.length }}</p>
<div v-bind:title="reverseMessageText">
<p>{{ reverseMessageText }}</p>
<button v-on:click="reverseMessage">Reverse Message</button>
</div>
<div>
<p>Data binding: <strong>{{ nameOfUser }}</strong></p>
<input type="text" v-model="nameOfUser">
</div>
<div>
<ol>
<todo-item v-for="todoItem in todos" v-bind:data="todoItem"></todo-item>
</ol>
</div>
</section>
<script src="scripts/app.js"></script>
</body>
</html>
app.js
var appComponent = Vue.component('todo-item', {
template: '<li>id: {{ data.id }}<br>text: {{ data.text }}</li>',
props: [
'data'
]
});
new Vue({
el: '#app',
data: {
msg: 'Hello World!',
message: 'You loaded this page on ' + new Date(),
seen: true,
isSeenText: 'Now you don\'t',
todos: [
{
text: 'Learn JavaScript'
},
{
text: 'Learn Vue'
},
{
text: 'Build something awesome'
}
],
reverseMessageText: 'Hello World from Vue.js!',
nameOfUser: 'John Rey'
},
methods: {
reverseMessage: function() {
this.reverseMessageText = this.reverseMessageText.split('').reverse().join('');
},
isSeen: function() {
this.seen = !this.seen;
this.isSeenText = this.seen ? 'Now you don\'t' : 'Now you see me';
}
}
});
console.log
https://i.sstatic.net/bb6Dz.jpg
To address the warning suggested by Vue, visit the link here. As a Vue newbie, I need guidance on resolving this warning even though I believe there are no errors in my code.