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【gon】jsでRails変数を取得する

Last updated at Posted at 2020-01-25

Railsでjsライブラリを使うときに楽にRailsで定義した変数をJavaScriptに渡したい!楽したい!

プログラマ三大美徳

1.怠慢(Laziness)
2.短気(Impatience)
3.傲慢(Hubris)

まさにこれですね。

何を使うか?

RailsといえばGemですね。[gon]というgemです。
https://github.com/gazay/gon

#インストール

Gemfileに記載

Gemfile
gem 'gon'

ターミナルからインストール

ターミナル
bundle install

読み込み設定

application.html.erb
<%= include_gon %>
<%= javascript_include_tag "application" %>

使ってみる

****.controller.rb
gon.user_name = 'my name is imaizumi'
****.js
console.log(gon.user_name)
スクリーンショット 2020-01-25 21.11.28.png

バッチリ変数を渡せました:yum:

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