diff --git a/checklistapi.drush.inc b/checklistapi.drush.inc
index 038191d..790a453 100644
--- a/checklistapi.drush.inc
+++ b/checklistapi.drush.inc
@@ -5,8 +5,8 @@
  * Drush commands for the Checklist API module.
  */
 
-use \Drupal\Core\Render\Element;
-use \Drupal\user\Entity\User;
+use Drupal\Core\Render\Element;
+use Drupal\user\Entity\User;
 
 /**
  * Implements hook_drush_command().
diff --git a/checklistapi.install b/checklistapi.install
index ceb0815..3e6f64a 100644
--- a/checklistapi.install
+++ b/checklistapi.install
@@ -5,8 +5,8 @@
  * Install, update, and uninstall functions for the Checklist API module.
  */
 
-use \Drupal\Core\Render\Element;
-use \Drupal\checklistapi\ChecklistapiChecklist;
+use Drupal\Core\Render\Element;
+use Drupal\checklistapi\ChecklistapiChecklist;
 
 /**
  * Update saved progress configuration to new schema.
diff --git a/checklistapi.js b/checklistapi.js
index 888bdda..e2ce45e 100644
--- a/checklistapi.js
+++ b/checklistapi.js
@@ -1,18 +1,17 @@
 (function ($) {
-  "use strict";
 
   /**
    * Updates the progress bar as checkboxes are changed.
    */
   Drupal.behaviors.checklistapiUpdateProgressBar = {
     attach: function (context) {
-      var total_items = $(':checkbox.checklistapi-item', context).length,
-        progress_bar = $('#checklistapi-checklist-form .progress__bar', context),
-        progress_percentage = $('#checklistapi-checklist-form .progress__percentage', context);
+      var total_items = $(':checkbox.checklistapi-item', context).length;
+      var progress_bar = $('#checklistapi-checklist-form .progress__bar', context);
+      var progress_percentage = $('#checklistapi-checklist-form .progress__percentage', context);
       $(':checkbox.checklistapi-item', context).change(function () {
-        var num_items_checked = $(':checkbox.checklistapi-item:checked', context).length,
-          percent_complete = Math.round(num_items_checked / total_items * 100),
-          args = {};
+        var num_items_checked = $(':checkbox.checklistapi-item:checked', context).length;
+        var percent_complete = Math.round(num_items_checked / total_items * 100);
+        var args = {};
         progress_bar.css('width', percent_complete + '%');
         args['@complete'] = num_items_checked;
         args['@total'] = total_items;
@@ -28,8 +27,8 @@
   Drupal.behaviors.checklistapiFieldsetSummaries = {
     attach: function (context) {
       $('#checklistapi-checklist-form .vertical-tabs__panes > details', context).drupalSetSummary(function (context) {
-        var total = $(':checkbox.checklistapi-item', context).length,
-          args = {};
+        var total = $(':checkbox.checklistapi-item', context).length;
+        var args = {};
         if (total) {
           args['@complete'] = $(':checkbox.checklistapi-item:checked', context).length;
           args['@total'] = total;
diff --git a/checklistapi.module b/checklistapi.module
index f2b1beb..0624f97 100644
--- a/checklistapi.module
+++ b/checklistapi.module
@@ -48,7 +48,7 @@ function checklistapi_checklist_access($id, $operation = 'any') {
  * @param string $id
  *   The checklist ID.
  *
- * @return ChecklistapiChecklist|false
+ * @return Drupal\checklistapi\ChecklistapiChecklist|false
  *   A fully-loaded checklist object, or FALSE if the checklist is not found.
  */
 function checklistapi_checklist_load($id) {
diff --git a/checklistapiexample/checklistapiexample.info.yml b/checklistapiexample/checklistapiexample.info.yml
index d358889..6e885ec 100644
--- a/checklistapiexample/checklistapiexample.info.yml
+++ b/checklistapiexample/checklistapiexample.info.yml
@@ -4,5 +4,5 @@ description: Provides an example implementation of the Checklist API.
 package: Example modules
 core: 8.x
 dependencies:
-  - checklistapi
+  - drupal:checklistapi
 configure: checklistapi.checklists.example_checklist
diff --git a/src/ChecklistapiChecklist.php b/src/ChecklistapiChecklist.php
index 7d96716..ba76dda 100644
--- a/src/ChecklistapiChecklist.php
+++ b/src/ChecklistapiChecklist.php
@@ -203,7 +203,7 @@ class ChecklistapiChecklist {
   /**
    * Gets the checklist form URL.
    *
-   * @return Url
+   * @return \Drupal\Core\Url
    *   The URL to the checklist form.
    */
   public function getUrl() {
diff --git a/src/Controller/ChecklistapiController.php b/src/Controller/ChecklistapiController.php
index c4b8255..93f391c 100644
--- a/src/Controller/ChecklistapiController.php
+++ b/src/Controller/ChecklistapiController.php
@@ -19,20 +19,20 @@ class ChecklistapiController extends ControllerBase {
   public function report() {
     // Define table header.
     $header = [
-      ['data' => t('Checklist')],
+      ['data' => $this->t('Checklist')],
       [
-        'data' => t('Progress'),
+        'data' => $this->t('Progress'),
         'class' => [RESPONSIVE_PRIORITY_MEDIUM],
       ],
       [
-        'data' => t('Last updated'),
+        'data' => $this->t('Last updated'),
         'class' => [RESPONSIVE_PRIORITY_MEDIUM],
       ],
       [
-        'data' => t('Last updated by'),
+        'data' => $this->t('Last updated by'),
         'class' => [RESPONSIVE_PRIORITY_LOW],
       ],
-      ['data' => t('Operations')],
+      ['data' => $this->t('Operations')],
     ];
 
     // Build table rows.
@@ -41,11 +41,12 @@ class ChecklistapiController extends ControllerBase {
     foreach ($definitions as $id => $definition) {
       $checklist = checklistapi_checklist_load($id);
       $row = [];
+
       $row[] = [
-        'data' => ($checklist->userHasAccess()) ? \Drupal::l($checklist->title, $checklist->getUrl()) : drupal_placeholder($checklist->title),
+        'data' => ($checklist->userHasAccess()) ? $this->l($checklist->title, $checklist->getUrl()) : drupal_placeholder($checklist->title),
         'title' => (!empty($checklist->description)) ? $checklist->description : '',
       ];
-      $row[] = t('@completed of @total (@percent%)', [
+      $row[] = $this->t('@completed of @total (@percent%)', [
         '@completed' => $checklist->getNumberCompleted(),
         '@total' => $checklist->getNumberOfItems(),
         '@percent' => round($checklist->getPercentComplete()),
@@ -58,7 +59,7 @@ class ChecklistapiController extends ControllerBase {
             '#type' => 'operations',
             '#links' => [
               'clear' => [
-                'title' => t('Clear'),
+                'title' => $this->t('Clear'),
                 'url' => Url::fromRoute($checklist->getRouteName() . '.clear', [], [
                   'query' => $this->getDestinationArray(),
                 ]),
@@ -78,7 +79,7 @@ class ChecklistapiController extends ControllerBase {
       '#theme' => 'table',
       '#header' => $header,
       '#rows' => $rows,
-      '#empty' => t('No checklists available.'),
+      '#empty' => $this->t('No checklists available.'),
     ];
 
     return $output;
diff --git a/src/Form/ChecklistapiChecklistClearForm.php b/src/Form/ChecklistapiChecklistClearForm.php
index 59a85e5..d51d3a5 100644
--- a/src/Form/ChecklistapiChecklistClearForm.php
+++ b/src/Form/ChecklistapiChecklistClearForm.php
@@ -80,4 +80,5 @@ class ChecklistapiChecklistClearForm extends ConfirmFormBase {
     // Redirect back to checklist.
     $form_state->setRedirect($form['#checklist']->getRouteName());
   }
+
 }
diff --git a/src/Form/ChecklistapiChecklistForm.php b/src/Form/ChecklistapiChecklistForm.php
index 7b22148..2424e63 100644
--- a/src/Form/ChecklistapiChecklistForm.php
+++ b/src/Form/ChecklistapiChecklistForm.php
@@ -6,7 +6,6 @@ use Drupal\Component\Utility\Xss;
 use Drupal\Core\Form\FormInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Render\Element;
-use Drupal\Core\Url;
 use Drupal\user\Entity\User;
 
 /**