jquery ui rails Installation and Theming Guide

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Installing jQuery UI in a Rails application is a straightforward process. You can add it to your project by running the command `gem install jquery-ui-rails` in your terminal.

To get started with jQuery UI in Rails, you need to have Rails 3.2 or later installed, as it requires the asset pipeline.

The jQuery UI gem provides a variety of themes to choose from, including the default theme, black-tie, and redmond.

Setting Up jQuery UI

To set up jQuery UI in your Rails application, you can use the jquery-ui-rails gem, which is easier to implement than manually downloading the files from the jQuery UI website.

First, add the gem to your Gemfile, making sure to only include the plugins you need. For example, if you're only using the autocomplete feature, you can add it like this: gem 'jquery-ui-rails', '~> 6.0.1', '>= 6.0.1', :require => 'jquery-ui'

Next, add a reference to the stylesheet manifest file, application.css, and include only the necessary files. The gem will take care of downloading the necessary images for you.

You can also include all plugins by referring to them like this: gem 'jquery-ui-rails', '~> 6.0.1', '>= 6.0.1', :require => 'jquery-ui'

Customization and Theming

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Customization and Theming is a crucial aspect of making your jQuery UI Rails application truly unique.

The sortable widget uses the jQuery UI CSS framework to style its look and feel. This means you can easily customize the appearance of your sortable elements without having to write a single line of custom CSS.

If you need sortable specific styling, you can use the following CSS class names for overrides or as keys for the classes option: ui-sortable: The sortable element.ui-sortable-helper: The element shown while dragging a sortable item. The element actually used depends on the helper option.

By using these class names, you can fine-tune the styling of your sortable widgets to match your application's design.

Internationalization and Localization

Internationalization and Localization is a crucial aspect of any web application, and jquery ui rails is no exception.

You can use the optional i18n modules for non-US locales, named jquery.ui.datepicker-xx[-YY], to support different languages.

These modules are not required automatically for performance reasons, so be sure to include the main datepicker module.

To get started, you'll need to include the main datepicker module and then add the specific i18n module for the locale you want to support.

JavaScript and CSS

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To get started with jQuery UI in Rails, you'll want to create a small JavaScript file, books.js, within the assets' javascripts folder. This file will namespace your objects to avoid conflicts with other objects named the same.

You'll create a function constructor for the Books function, which instantiates the input jQuery object and calls the _initAutocomplete method to set up the autocomplete plugin. The rest of the methods will be added to the prototype of the Books function, allowing them to be reused across instances.

To style the autocomplete plugin, you can modify the CSS classes added by jQuery UI. For example, you can change the ui-widget-content class to give the dropdown list a fresh look. You can also isolate the changes to only affect the current autocomplete instance by targeting the .books-search .results element.

Here are some jQuery UI modules you can require in your application.js file:

  • datepicker
  • autocomplete
  • dialog
  • menu

Remember to require the corresponding CSS module in your application.css file.

Stylesheet Assets

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The jQuery UI code is quite large, so for production apps, it's recommended to only include the modules that your application actually uses, which can help reduce the load time.

This is done by simply picking one or more modules from the asset list. Dependencies are automatically resolved, making it easy to get started.

If you only need the datepicker module, you can add it to your application.js, and in your application.css, require the corresponding CSS module.

You might want to require these stylesheet assets if you don't use any of the modules, but still want jQuery UI's basic theming CSS.

The JavaScript

In JavaScript, we create a new file called books.js within the assets' javascripts folder to namespace our objects and avoid conflicts with other objects having the same name.

We do this by using a namespace, which is a way to group related objects together. This helps to keep our code organized and prevent name collisions.

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To create a function constructor, we use the new keyword followed by the function name. In this case, we create a function constructor that instantiates the input jQuery object and calls the _initAutocomplete method.

The _initAutocomplete method is used to set up the autocomplete plugin, and it uses some of the jQuery UI autocomplete methods. These methods include source, appendTo, select, and _renderItem.

Here are the jQuery UI autocomplete methods used in the _initAutocomplete method:

  • source: points to our books resource, which returns the index.json.jbuilder file
  • appendTo: a jQuery selector that isolates our autocomplete and styles it accordingly
  • select: a function that is called when the user makes a selection
  • _renderItem: a method that creates a list item of the dropdown list of results

These methods are used to customize the behavior of the autocomplete plugin and provide a better user experience.

Software Development

In Rails 7+, importmap is a built-in feature that allows us to load third-party JavaScript libraries without using Webpack and Node.js.

To add jQuery and jQuery-UI to a Rails 7 application using importmap, you first need to create a new Rails 7 application, which will automatically include importmap as the default package manager.

You can then follow the steps to add jQuery and jQuery-UI, starting with creating a home controller using the rails command.

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The home controller should be set as the root path in the config/routes.rb file, and a stimulus.js controller should be created for the home controller using the rails command.

Next, you need to connect the home controller and the stimulus home controller, which can be done by adding a div to the app\views\home\index.html.erb file and connecting it with the stimulus home controller using the html data-controller attribute.

After that, you need to open the stimulus home_controller.js file and run the rails server to see the running app on http://127.0.0.1:3000.

You can also check jQuery using console.log().

To add jQuery and jQuery-UI to your application, you need to open the Gemfile and add two gems, then rename the app\assets\stylesheets\application.css file to application.scss and add a line to load jQuery-UI CSS.

You should also add jQuery and jQuery-UI in the application.js file and open the config\initializers\assets.rb to add a line to precompile jQuery and jQuery-UI.

The jquery-ui-rails repository is contributor-friendly and has a git submodule containing the official jquery-ui repo, making it easy to hack the jQuery UI code.

Assuming your app's Gemfile points at your jquery-ui-rails checkout, you can refresh your browser and your changes to jQuery UI will be live in your Rails application.

You can also send pull requests to the jquery-ui GitHub project straight out of your submodule, as described in their Getting Involved guide.

Rosemary Boyer

Writer

Rosemary Boyer is a skilled writer with a passion for crafting engaging and informative content. With a focus on technical and educational topics, she has established herself as a reliable voice in the industry. Her writing has been featured in a variety of publications, covering subjects such as CSS Precedence, where she breaks down complex concepts into clear and concise language.

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