excep tonly one css, don’t load any css

I have below snippet but it doesn’t match what I want exactly.It avoids load any css file for my theme but also I want load stylepure.css. The stylepure css doesn’t contain unused css so I want to load only it for my homepage. How can I except the css file? thanks

how use ajax to custom page template

i’m completely new to WordPress ajax .
i’m working on new custom template . there is a custom form which stores data on custom database .
for search section i need to use Ajax . then i found one way , that is create new template page which called json.php for example . it echoing the data in json formating .