Why is the page effect of the template rendered by res.render () gone and js invalid?

  node.js, question

Excuse me, I set display:none for body in html template inside

The fadeIn entry effect of jQuery was written to body in the load completion event.

Why is the effect of previewing the template file normal? After using node plus artTemplate plus express to render the page, the browser really sees a blank effect?

(The source code of the returned page is the rendered complete source code)

Please check whether the js path is correct or not, open the debug window and report the error.