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【Rails】JavaScriptを特定のビューで読み込む方法

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開発環境

・Ruby: 2.5.7
・Rails: 5.2.4
・Vagrant: 2.2.7
・VirtualBox: 6.1
・OS: macOS Catalina

前提

下記実装済み。

Slim導入

実装

1.application.jsを編集

=を削除する。
こうする事で、assets/javascripts内のjavascriptファイルが自動で読み込まれなくなる。

application.js
//変更前
//= require_tree

//変更前
// require_tree

2.environmentsを編集

開発環境で反映させたい場合はdevelopment.rb
本番環境で反映させたい場合はproduction.rbを編集する。

development.rb
Rails.application.configure do
  # 個別で読み込みたいjavascriptファイルを設定
  config.assets.precompile += ['gmap.js']
  # coffeeスクリプトは拡張子を付けるとエラーが出るので注意!
  config.assets.precompile += ['jquery.jpostal']
end

3.ビューを編集

~.html.slim
/ このページで読み込みたいjavascriptファイルを設定
= javascript_include_tag 'gmap.js'
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