Why won't my click event in Vue.js fire? - vue.js

Question

I'm trying to use Vue's on-click directive on a div but it does not fire as intended. When I click the .demo class nothing happens; I should get a 'test clicked' in the console. I don't see any errors in the console, so I don't know what am I doing wrong.
var app = new Vue({
el: '#app',
data: {
title: 'This is the first vue app',
name: 'ALRAZY',
link: 'http://google.com',
attachRed: false
},
methods: {
changeLink: function() {
this.link = 'http://apple.com'
}
}
})
body {
font-family: 'Trykker', 'Spectral SC', serif;
}
h1,h2,h3,h4,h5,h6 {
font-family: 'Spectral SC', serif;
}
p {
font-family: 'Trykker', serif;
}
.demo {
width: 100px;
height: 100px;
background-color: grey;
display: inline-block;
margin: 10px;
}
.red {
background: red;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://fonts.googleapis.com/css?family=Spectral+SC:400,400i,500,500i,600|Trykker" rel="stylesheet" >
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div class="container">
<div class="row">
<div id="app">
<h1>{{ title }} </h1>
<input type="text" v-model="name" name="">
<p> {{ name }}</p>
<button onclick="changeLink" class="btn btn-danger btn-lg">click to change</button>
<a :href="link" target="_blank">Link</a>
<!-- style-vue -->
<div class="demo" onclick="attachRed = !attachRed" :class="{red: attachRed}"></div>
<p v-if="show">You can see me!!!</p>
<p v-else>Do You see me??</p>
</div>
</div>
</div>

Answer 1

You're using the standard onclick attribute which is not going to trigger vue methods. Try using v-on:click="changeLink()" or #click="changeLink()" (I'm not entirely sure if the second is the correct syntax). That should resolve your problem.
Similarly, you can do #click="attachRed = !attachRed".