chart.jsリダイレクト時に表示しない

<div class="container mb-5 pt-5">
<%= Gon::Base.render_data %>
  <canvas id="myChart" width="80" height="30"></canvas>
</div>



<script>
  const ctx = document.getElementById('myChart');

  new Chart(ctx, {
    type: 'bar',
    data: {
      labels: ['January', 'February', 'March'],
      datasets: [{
        label: 'Dtaset1',
        data: [gon.label_backdata,  -15, -60],
        backgroundColor: '#ffb6c1',
        borderWidth: 1
      },
      {
        label: 'Dtaset2',
        data: [gon.label_frontdata, 10, -10],
        backgroundColor: '#ffdead',
        borderWidth: 1
      },
      {
        label: 'Dtaset3',
        data: [gon.label_infradata, -18, 18],
        backgroundColor: '#ffffe0',
        borderWidth: 1
      }]
    },
    options: {
      plugins: {
            title: {
                display: true,
                text: 'Chart.js Bar Chart'
            }
        },
      scales: {
        y: {
          beginAtZero: true
        }
      }
    }
  });
</script>

source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby "3.1.2"
gem 'bootstrap', '~> 5.1'
gem 'sass-rails', '>= 6'
gem 'jquery-rails'
gem 'ruby-vips', '~> 2.1', '>= 2.1.4'
gem "image_processing", ">= 1.2"
gem 'pry-rails'
gem 'gon', '~> 6.4'


# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", "~> 7.0.4", ">= 7.0.4.3"

# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
gem "sprockets-rails"

# Use postgresql as the database for Active Record
gem "pg", "~> 1.1"

# Use the Puma web server [https://github.com/puma/puma]
gem "puma", "~> 5.0"

# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
gem "importmap-rails"

# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
gem "turbo-rails"

# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
gem "stimulus-rails"

# Build JSON APIs with ease [https://github.com/rails/jbuilder]
gem "jbuilder"

# Use Redis adapter to run Action Cable in production
# gem "redis", "~> 4.0"

# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
# gem "kredis"

# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
gem "bcrypt", "~> 3.1.7"

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]

# Reduces boot times through caching; required in config/boot.rb
gem "bootsnap", require: false

# Use Sass to process CSS
# gem "sassc-rails"

# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
# gem "image_processing", "~> 1.2"

group :development, :test do
  # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
  gem "debug", platforms: %i[ mri mingw x64_mingw ]
end

group :development do
  # Use console on exceptions pages [https://github.com/rails/web-console]
  gem "web-console"

  # Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
  # gem "rack-mini-profiler"

  # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
  # gem "spring"
end

group :test do
  # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
  gem 'rspec-rails'
  gem 'factory_bot_rails'
  gem "capybara"
  gem "selenium-webdriver"
  gem "webdrivers"
  gem 'launchy'
  gem 'capybara-screenshot'
end

<script data-turbolinks-eval="false">
  // JavaScriptコード
</script>