I am trying to understand how vue works. To do that I simplify it as much as possible, hence no webpack no CDNs or any other packages (unless its a necessity).
So, Came up with this but trying to inject a simple a variable into html gives vue is undefined error.
*vue.js file is taken from npm vue package.
<html>
<head>
<script src="vue.js"></script>
<script>
new vue({
data: 'This must be injected'
}).$mount('#app');
</script>
</head>
<body>
<div id="app">
<p> {{ data }} </p>
</div>
<h1>This is a sample header</h1>
</body>
</html>
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Answer
You need to have Vue load after the Dom is ready so it can find the element to attach itself to — don’t put it in the head. Also it’s upper-case Vue. And Data can’t just be a naked property it should be a function that returns an object with your properties (it can also be an an object, but it’s not recommended once the app starts getting bigger).
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<p> {{ data }} </p>
</div>
<h1>This is a sample header</h1>
<script>
Vue.config.productionTip = false
new Vue({
data(){ return {
data: 'This must be injected'
}
}
}).$mount('#app');
</script>