How to call js functions?

[cryptoBOOOOM]

I include a js file in my main template and i want to call a function from that within a view but it sais the function is not defined... How can i include functions?

[bminer]

You can expose the function by passing it into the view at render-time.

Example (passing the sum function into a view):

const sum = (a, b) => a + b;
const locals = {sum};
tmpl(locals, cb)