Hi,
the best to explore how a basic vue app is built would be to have a look at https://github.com/skjnldsv/vueexample
The main difference to the PHP templating is that with vue there is just one template with an empty div where the actual Vue app is attached to: https://github.com/skjnldsv/vueexample/blob/master/src/main.js#L32-L35
If you already have an existing PHP app, you might want to start by adding a basic skeleton to build the Vue app from the src/ directory. The essential files from the vueexample app are:
- package.json
- webpack.common.js
- webpack.dev.js
- webpack.prod.js
- .babelrc.js
- .eslintrc.js
- .stylelintrc.js
Please don’t hesitate to ask if anything is unclear or not working. 