[RUBY] How to use JQuery in js.erb of Rails6

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JQuery $ ('# hoge') didn't work when I called js.erb on a controller that received the remote: true form of a Rails 6 view.

JS error occurred: ʻUncaught ReferenceError: $ is not defined`


Add the following line in app / javascript / packs / application.js



window.$ = jQuery; //here!


$('.modal_area').html('<%= j(render "modal") %>');

I had a similar definition in config / webpack / environment.js, but I needed this description to use it from within the js.erb file.

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