Design

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The design of the backend is ready for any kind of application. It's been created with Bootstrap 5, Font Awesome icons and some custom CSS and JavaScript code; all managed by Webpack via Symfony's Webpack Encore.

Like any other Symfony bundle, assets are copied to (or symlinked from) the public/bundles/ directory of your application when installing or updating the bundle. If this doesn't work for any reason, your backend won't display the proper CSS/JS styles. In those cases, run this command to install those assets manually:

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# remove the --symlink option if your system doesn't support symbolic links
$ php bin/console assets:install --symlink

Depending on your needs, there are several ways of customizing the design. Some of them require pure CSS/JavaScript code and others require overriding and/or creating new Twig templates.

Modifying Backend Templates

Backend pages are created with multiple Twig templates and fragments. You can modify them in two ways:

  • Override EasyAdmin templates using Symfony's mechanism to override templates (this is the same for all bundles, not only EasyAdmin);
  • Replace EasyAdmin templates using EasyAdmin features.

Overriding Templates

Tip

Instead of using Symfony mechanism to override templates, you may consider using a similar but more powerful feature provided by EasyAdmin to replace templates, as explained in the next section.

Following Symfony's mechanism to override templates from bundles, you must create the templates/bundles/EasyAdminBundle/ directory in your application and then create new templates with the same path as the original templates. For example:

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your-project/
├─ ...
└─ templates/
   └─ bundles/
      └─ EasyAdminBundle/
         ├─ layout.html.twig
         ├─ menu.html.twig
         ├─ crud/
         │  ├─ index.html.twig
         │  ├─ detail.html.twig
         │  └─ field/
         │     ├─ country.html.twig
         │     └─ text.html.twig
         ├─ label/
         │  └─ null.html.twig
         └─ page/
            ├─ content.html.twig
            └─ login.html.twig

Instead of creating the new templates from scratch, you can extend from the original templates and change only the parts you want to override. However, you must use a special syntax inside extends to avoid an infinite loop:

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{# templates/bundles/EasyAdminBundle/layout.html.twig #}

{# DON'T DO THIS: it will cause an infinite loop #}
{% extends '@EasyAdmin/layout.html.twig' %}

{# DO THIS: the '!' symbol tells Symfony to extend from the original template #}
{% extends '@!EasyAdmin/layout.html.twig' %}

{% block sidebar %}
    {# ... #}
{% endblock %}

Replacing Templates

This option allows you to render certain parts of the backend with your own Twig templates. First, you can replace some templates globally in the dashboard:

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use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractDashboardController;

class DashboardController extends AbstractDashboardController
{
    // ...

    public function configureCrud(): Crud
    {
        return Crud::new()
            // ...

            // the first argument is the "template name", which is the same as the
            // Twig path but without the `@EasyAdmin/` prefix
            ->overrideTemplate('label/null', 'admin/labels/my_null_label.html.twig')

            ->overrideTemplates([
                'crud/index' => 'admin/pages/index.html.twig',
                'crud/field/textarea' => 'admin/fields/dynamic_textarea.html.twig',
            ])
        ;
    }
}

You can also replace templates per CRUD controller (this override any change done in the dashboard):

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namespace App\Controller\Admin;

use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;

class ProductCrudController extends AbstractCrudController
{
    // ...

    public function configureCrud(Crud $crud): Crud
    {
        return $crud
            // ...

            ->overrideTemplate('crud/layout', 'admin/advanced_layout.html.twig')

            ->overrideTemplates([
                'crud/field/text' => 'admin/product/field_id.html.twig',
                'label/null' => 'admin/labels/null_product.html.twig',
            ])
        ;
    }
}

Fields And Actions Templates

Each field (and each action) defines a setTemplatePath() method to set the Twig template used to render that specific field (or action):

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TextField::new('...', '...')
    // ...
    ->setTemplatePath('custom_fields/text.html.twig');

// ...

Action::new('...', '...')
    // ...
    ->setTemplatePath('admin/actions/my_custom_action.html.twig');

The setTemplatePath() method only applies to fields displayed on the index and detail pages. Read the next section to learn how to customize fields in the new and edit pages, which use Symfony forms.

Form Field Templates

EasyAdmin provides a ready-to-use form theme based on Bootstrap 5. Dashboards and CRUD controllers define addFormTheme(string $themePath) and setFormThemes(array $themePaths) methods so you can customize individual form fields using your own form theme.

Imagine a form field where you want to include a <a> element that links to additional information. If the field is called title and belongs to a Product entity, the configuration would look like this:

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TextField::new('title')
    // ...
    ->setFormTypeOptions([
        'block_name' => 'custom_title',
    ]);

The next step is to define the template fragment used by that field, which requires to know the form fragment naming rules defined by Symfony:

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{# templates/admin/form.html.twig #}
{# note that the Twig block name starts with an uppercase letter
   ('_Product_...' instead of '_product_...') because the first part
   of the block name is the unmodified entity name #}
{% block _Product_custom_title_widget %}
    {# ... #}
    <a href="...">More information</a>
{% endblock %}

Finally, add this custom theme to the list of themes used to render backend forms:

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namespace App\Controller\Admin;

use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;

class ProductCrudController extends AbstractCrudController
{
    // ...

    public function configureCrud(Crud $crud): Crud
    {
        return $crud
            // ...

            // don't forget to add EasyAdmin's form theme at the end of the list
            // (otherwise you'll lose all the styles for the rest of form fields)
            ->setFormThemes(['admin/form.html.twig', '@EasyAdmin/crud/form_theme.html.twig'])
        ;
    }
}

Note

You can also override the form widget by using the original field name. In the example above it would look like this: {% block _Product_title_widget %}. The full syntax is: {% block _<Entity name>_<Field name>_widget %}.

Adding Custom Web Assets

Use the configureAssets() method in the dashboard and/or the CRUD controllers to add your own CSS and JavaScript files:

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namespace App\Controller\Admin;

use EasyCorp\Bundle\EasyAdminBundle\Config\Assets;
use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;

class ProductCrudController extends AbstractCrudController
{
    // ...

    public function configureAssets(Assets $assets): Assets
    {
        return $assets
            // adds the CSS and JS assets associated to the given Webpack Encore entry
            // it's equivalent to adding these inside the <head> element:
            // {{ encore_entry_link_tags('...') }} and {{ encore_entry_script_tags('...') }}
            ->addWebpackEncoreEntry('admin-app')

            // it's equivalent to adding this inside the <head> element:
            // <link rel="stylesheet" href="{{ asset('...') }}">
            ->addCssFile('build/admin.css')
            ->addCssFile('https://example.org/css/admin2.css')

            // it's equivalent to adding this inside the <head> element:
            // <script src="{{ asset('...'') }}"></script>
            ->addJsFile('build/admin.js')
            ->addJsFile('https://example.org/js/admin2.js')

            // use these generic methods to add any code before </head> or </body>
            // the contents are included "as is" in the rendered page (without escaping them)
            ->addHtmlContentToHead('<link rel="dns-prefetch" href="https://assets.example.com">')
            ->addHtmlContentToBody('<script> ... </script>')
            ->addHtmlContentToBody('<!-- generated at '.time().' -->')
        ;
    }
}

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JavaScript files and JavaScript Webpack Encore entries are included in the <head> element of the page. In previous EasyAdmin versions they were included at the bottom of the <body> element.

If you need to customize the HTML attributes or other features of the <link> and <script> tags, pass an Asset object to the addCssFile(), addJsFile() and addWebpackEncoreEntry() methods:

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use EasyCorp\Bundle\EasyAdminBundle\Config\Asset;
// ...

return $assets
    ->addCssFile(Asset::new('build/admin.css')->preload()->nopush())
    ->addCssFile(Asset::new('build/admin-print.css')->htmlAttr('media', 'print'))

    ->addJsFile(Asset::new('build/admin.js')->defer())
    ->addJsFile(Asset::new('build/admin.js')->preload())
    ->addJsFile(Asset::new('build/admin.js')->htmlAttr('referrerpolicy', 'strict-origin'))

    ->addWebpackEncoreEntry(Asset::new('admin-app')->webpackEntrypointName('...'))
;

Tip

Fields can also add CSS and JavaScript assets to the rendered pages. Read this section to learn how.

Note

If you want to unload the default assets included by EasyAdmin, override the default layout.html.twig template and empty the head_stylesheets and head_javascript Twig blocks.

Customizing the Backend Design

The design of the backend is created with lots of CSS variables. This makes it easier to customize it to your own needs. You'll find all variables in the vendor/easycorp/easyadmin-bundle/assets/css/easyadmin-theme/variables-theme.scss file. To override any of them, create a CSS file and redefine the variable values:

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/* public/css/admin.css */
:root {
    /* make the backend contents as wide as the browser window */
    --body-max-width: 100%;
    /* change the background color of the <body> */
    --body-bg: #f5f5f5;
    /* make the base font size smaller */
    --font-size-base: 13px;
    /* remove all border radius to make corners straight */
    --border-radius: 0px;
}

Then, load this CSS file in your dashboard and/or resource admin:

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use EasyCorp\Bundle\EasyAdminBundle\Config\Assets;
use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractDashboardController;

class DashboardController extends AbstractDashboardController
{
    // ...

    public function configureAssets(): Assets
    {
        return Assets::new()->addCssFile('css/admin.css');
    }
}

Note

Because of how Bootstrap styles are defined, it's not possible to use CSS variables to override every style. Sometimes you may need to also override the value of some Sass variables (which are defined in the
assets/css/easyadmin-theme/variables-bootstrap.scss file).

CSS Selectors

The <body> element of every backend page includes different id and class attributes to help you target your own styles. The id follows this pattern:

Page <body> ID attribute
detail ea-detail-<entity_name>-<entity_id>
edit ea-edit-<entity_name>-<entity_id>
index ea-index-<entity_name>
new ea-new-<entity_name>

If you are editing for example the element with id = 200 of the User entity, the <body> of that page will be <body id="easyadmin-edit-User-200" ...>.

The pattern of the class attribute is different because it applies several CSS classes at the same time:

Page <body> CSS class
detail ea-detail ea-detail-<entity_name>
edit ea-edit ea-edit-<entity_name>
index ea-index ea-index-<entity_name>
new ea-new ea-new-<entity_name>

If you are displaying for example the listing of User entity elements, the <body> of that page will be <body class="ea index index-User" ...>.

Managing the Backend Assets with Webpack

EasyAdmin uses Webpack (via Symfony's Webpack Encore) to manage its CSS and JavaScript assets. This bundle provides both the source files and the compiled versions of all assets, so you don't have to install Webpack to use this bundle.

However, if you want total control over the backend styles, you can use Webpack to integrate the SCSS and JavaScript source files provided in the assets/ directory. The only caveat is that EasyAdmin doesn't use Webpack Encore yet when loading the assets, so you can't use features like versioning. This will be fixed in future versions.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
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