setting a fade to turbo_stream

Question

Rails UJS has a compactness about it. In a single line of a js.erb file, one calls the dom_id, a partial AND gives it some interaction (that confirms the change in the object with a minimalist approach). Example with jQuery library invoked.

$("#header").html("<%= j render 'header', collection: @trecks %>").css({ opacity: 0 }).fadeTo('slow',1); 

with the goal of removing UJS and the reliance on jQuery,
What is the most succinct way to implement an equivalent in vanilla JS of .fadeTo('slow',1) on the turbo stream?