Including element-specific javascript in Rails

Question

I like to keep my javascript out of views if possible, but I've found that difficult in certain situations.

Say I have a video partial that has corresponding javascript (using jplayer):

.video
  content_for :javascript/head
    / jplayer instance code here

One alternative I've thought is to hook into .video from within a separate js file and instantiate jplayer objects via that.

$('.video').each
  # jplayer instance code here

My question is, what about pages where '.video' isn't found? Will it cause problems if I have lots of jquery finders that are missing?

Jonathan Marzullo · Accepted Answer · 2013-10-14 17:16:48Z

1

you could try to check the length of .video and only run if it does exist

var $video = $('.video');
if(video.length !== 0){
     $('.video').each
     # jplayer instance code here
}

it checks the length of that jQuery object in the DOM

answered Oct 14, 2013 at 17:16

Jonathan Marzullo

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1 Comment

@Zenph did this answer your question? If i answered can you please mark it as answered :)