Jade: load external javascript and call function

Question

I was learning Express/Node/Jade and now in the Jade file I want to include a javascript file from the public folder just for the page. For example, in jade file I type this

Answer 1

Save your JS file and link it in your Jade file as:

script(src="filepath/yourJSfile.js")

Then call the function, I'm using a button here for example:

button(class="btn", onclick='functionName()')