<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<link rel="icon" href="<%= BASE_URL %>favicon.ico" />
<title><%= htmlWebpackPlugin.options.title %></title>
</head>
<body>
<noscript>
<strong
>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work
properly without JavaScript enabled. Please enable it to
continue.</strong
>
</noscript>
<div id="app" thisIsAProp="This is what I need"></div>
<!-- built files will be auto injected -->
</body>
</html>
So in my main.js file the app is mounted on #app. In my App.js file I need the properties on the <div id="app"> element. I tried using web-components which did work for a basic app but another requirement is I need to be able to overwrite the CSS variables within the parent web page, and when creating web components, vue creates them with a shadow-dom. Is there a better way to get the values from the vue mount element?
Data can be passed from the the page to entry point either with global variables:
<script>
window.myApp = {
foo: 'bar'
}
</script>
<div id="app"></div>
And accessed inside the app like window.myApp.foo.
Arbitrary string data (including JSON) can be passed through HTML attributes, data attributes commonly serve this purpose:
<div id="app" data-foo="bar"></div>
And accessed inside the app like document.querySelector('#app').dataset.foo.
Solved my problem
I was able to get the properties from the index.html mount into my App.vue file using
beforeMount() {
this.neededData = this.$parent.$el.getAttribute("thisIsAProp");
},