diff --git a/app/javascript/src/javascripts/artist.js b/app/javascript/src/javascripts/artist.js
index 2484ccae6..59386fadf 100644
--- a/app/javascript/src/javascripts/artist.js
+++ b/app/javascript/src/javascripts/artist.js
@@ -9,10 +9,10 @@ Artist.update = function (id, params) {
       type: "PUT",
       url: "/artists/" + id + ".json",
       data: params,
-      success: function(data) {
+      success: function() {
         Utility.notice("Artist updated.");
       },
-      error: function(data) {
+      error: function() {
         Utility.error(`There was an error updating <a href="/artists/${id}">artist #${id}</a>`);
       }
     });
diff --git a/app/javascript/src/javascripts/blacklists.js b/app/javascript/src/javascripts/blacklists.js
index 9bcd2b96a..bbdd0bebd 100644
--- a/app/javascript/src/javascripts/blacklists.js
+++ b/app/javascript/src/javascripts/blacklists.js
@@ -9,7 +9,7 @@ Blacklist.post_count = 0;
 Blacklist.entries = [];
 
 Blacklist.entryGet = function (line) {
-  return $.grep(Blacklist.entries, function (e, i) {
+  return $.grep(Blacklist.entries, function (e) {
     return e.tags === line;
   })[0];
 };
@@ -326,7 +326,7 @@ Blacklist.initialize_blacklist_editor = function () {
         }
       }).done(function () {
         Utility.notice("Blacklist updated");
-      }).fail(function (data, status, xhr) {
+      }).fail(function () {
         Utility.error("Failed to update blacklist");
       });
     }
diff --git a/app/javascript/src/javascripts/comments.js b/app/javascript/src/javascripts/comments.js
index 828aee918..6f24ae540 100644
--- a/app/javascript/src/javascripts/comments.js
+++ b/app/javascript/src/javascripts/comments.js
@@ -50,7 +50,7 @@ Comment.show_all = function(e) {
     current_comment_section.html(data.html);
     Comment.reinitialize_all();
     $(window).trigger("e621:add_deferred_posts", data.posts);
-  }).fail(function(data) {
+  }).fail(function() {
     Utility.error("Failed to fetch all comments for this post.");
   });
 };
@@ -65,10 +65,10 @@ Comment.hide = function (e) {
     url: `/comments/${cid}/hide.json`,
     type: 'POST',
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     $(`.comment[data-comment-id="${cid}"] div.author h1`).append(" (hidden)");
     $(`.comment[data-comment-id="${cid}"]`).attr('data-is-deleted', 'true');
-  }).fail(function (data) {
+  }).fail(function () {
     Utility.error("Failed to hide comment.");
   });
 };
@@ -83,11 +83,11 @@ Comment.unhide = function (e) {
     url: `/comments/${cid}/unhide.json`,
     type: 'POST',
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     const $author = $(`.comment[data-comment-id="${cid}"] div.author h1`);
     $author.text($author.text().replace(" (hidden)", ""));
     $(`.comment[data-comment-id="${cid}"]`).attr('data-is-deleted', 'false');
-  }).fail(function (data) {
+  }).fail(function () {
     Utility.error("Failed to unhide comment.");
   });
 };
@@ -102,9 +102,9 @@ Comment.delete = function (e) {
     url: `/comments/${cid}.json`,
     type: 'DELETE',
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     parent.remove();
-  }).fail(function (data) {
+  }).fail(function () {
     Utility.error("Failed to delete comment.");
   });
 };
diff --git a/app/javascript/src/javascripts/common.js b/app/javascript/src/javascripts/common.js
index 7656b791b..3074a7eaa 100644
--- a/app/javascript/src/javascripts/common.js
+++ b/app/javascript/src/javascripts/common.js
@@ -23,7 +23,7 @@ function initSearch() {
 }
 
 $(function() {
-  $("#theme-switcher").change(function(e) {
+  $("#theme-switcher").change(function() {
     let theme = $(this).val();
     LS.put("theme", theme);
     $("body").attr("data-th-main", theme);
@@ -60,9 +60,9 @@ $(function() {
       method: "PUT",
       url: path,
       dataType: 'json'
-    }).done(data => {
+    }).done(() => {
       location.reload();
-    }).fail(data => {
+    }).fail(() => {
       Utility.error("Failed to revert to specified version.");
     })
   });
diff --git a/app/javascript/src/javascripts/favorites.js b/app/javascript/src/javascripts/favorites.js
index 46dd60d61..62f4dacb5 100644
--- a/app/javascript/src/javascripts/favorites.js
+++ b/app/javascript/src/javascripts/favorites.js
@@ -42,7 +42,7 @@ Favorite.create = function (post_id) {
       Post.notice_update("dec");
       Favorite.after_action(post_id, 1);
       Utility.notice("Favorite added");
-    }).fail(function (data, status, xhr) {
+    }).fail(function (data) {
       Utility.error("Error: " + data.responseJSON.message);
     });
   });
@@ -60,7 +60,7 @@ Favorite.destroy = function (post_id) {
       Post.notice_update("dec");
       Favorite.after_action(post_id, -1);
       Utility.notice("Favorite removed");
-    }).fail(function (data, status, xhr) {
+    }).fail(function (data) {
       Utility.error("Error: " + data.responseJSON.message);
     });
   });
diff --git a/app/javascript/src/javascripts/forum_posts.js b/app/javascript/src/javascripts/forum_posts.js
index 86d413d99..753de516a 100644
--- a/app/javascript/src/javascripts/forum_posts.js
+++ b/app/javascript/src/javascripts/forum_posts.js
@@ -84,11 +84,11 @@ ForumPost.vote_remove = function(evt) {
     type: "DELETE",
     dataType: "json",
     accept: "text/javascript",
-  }).done(function(data) {
+  }).done(function() {
     $(evt.target).parents(".own-forum-vote").remove();
     $(`#forum-post-votes-for-${id} .forum-post-vote-block`).show();
     Utility.notice("Vote removed.");
-  }).fail(function(data) {
+  }).fail(function() {
     Utility.error("Failed to unvote on forum post.");
   })
 }
@@ -136,10 +136,10 @@ ForumPost.hide = function (e) {
     url: `/forum_posts/${fpid}/hide.json`,
     type: 'POST',
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     $(`.forum-post[data-forum-post-id="${fpid}"] div.author h4`).append(" (hidden)");
     $(`.forum-post[data-forum-post-id="${fpid}"]`).attr('data-is-hidden', 'true');
-  }).fail(function (data) {
+  }).fail(function () {
     Utility.error("Failed to hide post.");
   });
 };
@@ -154,11 +154,11 @@ ForumPost.unhide = function (e) {
     url: `/forum_posts/${fpid}/unhide.json`,
     type: 'POST',
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     const $author = $(`.forum-post[data-forum-post-id="${fpid}"] div.author h4`);
     $author.text($author.text().replace(" (hidden)", ""));
     $(`.forum-post[data-forum-post-id="${fpid}"]`).attr('data-is-hidden', 'false');
-  }).fail(function (data) {
+  }).fail(function () {
     Utility.error("Failed to unhide post.");
   });
 };
diff --git a/app/javascript/src/javascripts/local_storage.js b/app/javascript/src/javascripts/local_storage.js
index 54063b585..45a9be018 100644
--- a/app/javascript/src/javascripts/local_storage.js
+++ b/app/javascript/src/javascripts/local_storage.js
@@ -13,6 +13,7 @@ let LS = {
     try {
       return JSON.parse(value);
     } catch (error) {
+      console.log(error);
       return null;
     }
   }
diff --git a/app/javascript/src/javascripts/notes.js b/app/javascript/src/javascripts/notes.js
index 3f915877a..dd55b6933 100644
--- a/app/javascript/src/javascripts/notes.js
+++ b/app/javascript/src/javascripts/notes.js
@@ -16,14 +16,14 @@ let Note = {
       $note_box.attr("data-id", String(id));
       $note_box.draggable({
         containment: $("#image"),
-        stop: function(e, ui) {
+        stop: function() {
           Note.Box.update_data_attributes($note_box);
         }
       });
       $note_box.resizable({
         containment: $("#image"),
         handles: "se, nw",
-        stop: function(e, ui) {
+        stop: function() {
           Note.Box.update_data_attributes($note_box);
         }
       });
@@ -406,11 +406,11 @@ let Note = {
       return hash;
     },
 
-    error_handler: function(xhr, status, exception) {
+    error_handler: function(xhr) {
       Utility.error("Error: " + (xhr.responseJSON.reason || xhr.responseJSON.reasons.join("; ")));
     },
 
-    success_handler: function(data, status, xhr) {
+    success_handler: function(data) {
       var $note_box = null;
 
       if (data.html_id) { // new note
diff --git a/app/javascript/src/javascripts/post_mode_menu.js b/app/javascript/src/javascripts/post_mode_menu.js
index 2b4212ca8..bebe83d42 100644
--- a/app/javascript/src/javascripts/post_mode_menu.js
+++ b/app/javascript/src/javascripts/post_mode_menu.js
@@ -54,7 +54,7 @@ PostModeMenu.initialize_selector = function() {
     $("#mode-box-mode").val(LS.get("mode"));
   }
 
-  $("#mode-box-mode").on("change.danbooru", function(e) {
+  $("#mode-box-mode").on("change.danbooru", function() {
     PostModeMenu.change();
     $("#tag-script-field:visible").focus().select();
   });
@@ -103,7 +103,7 @@ PostModeMenu.close_edit_form = function() {
 }
 
 PostModeMenu.initialize_tag_script_field = function() {
-  $("#tag-script-field").blur(function(e) {
+  $("#tag-script-field").blur(function() {
     const script = $(this).val();
 
     const current_script_id = LS.get("current_tag_script_id");
diff --git a/app/javascript/src/javascripts/post_replacement.js b/app/javascript/src/javascripts/post_replacement.js
index 1e5963c60..3ded0806e 100644
--- a/app/javascript/src/javascripts/post_replacement.js
+++ b/app/javascript/src/javascripts/post_replacement.js
@@ -34,7 +34,7 @@ PostReplacement.approve = function (id, penalize_current_uploader) {
     dataType: 'json'
   }).done(function () {
     set_status($row, "approved");
-  }).fail(function (data, status, xhr) {
+  }).fail(function (data) {
     Utility.error(data.responseText);
     set_status($row, "replacement failed");
   });
@@ -51,7 +51,7 @@ PostReplacement.reject = function (id) {
     dataType: 'json'
   }).done(function () {
     set_status($row, "rejected");
-  }).fail(function (data, status, xhr) {
+  }).fail(function (data) {
     Utility.error(data.responseText);
     set_status($row, "rejecting failed");
   });
@@ -69,7 +69,7 @@ PostReplacement.promote = function (id) {
   }).done(function (data) {
     Utility.notice(`Replacement promoted to post #${data.post.id}`);
     set_status($row, "promoted");
-  }).fail(function (data, status, xhr) {
+  }).fail(function (data) {
     Utility.error(data.responseText);
     set_status($row, "promoting failed");
   });
@@ -83,10 +83,10 @@ PostReplacement.toggle_penalize = function ($target) {
     type: "PUT",
     url: `/post_replacements/${id}/toggle_penalize.json`,
     dataType: 'json'
-  }).done(function (data) {
+  }).done(function () {
     $target.removeClass("disabled-link");
     $currentStatus.text($currentStatus.text() == "yes" ? "no" : "yes");
-  }).fail(function (data, status, xhr) {
+  }).fail(function (data) {
     Utility.error(data.responseText);
   });
 }
diff --git a/app/javascript/src/javascripts/post_sets.js b/app/javascript/src/javascripts/post_sets.js
index ffad5b16a..59c733eb1 100644
--- a/app/javascript/src/javascripts/post_sets.js
+++ b/app/javascript/src/javascripts/post_sets.js
@@ -14,7 +14,7 @@ PostSet.add_post = function (set_id, post_id) {
       url: "/post_sets/" + set_id + "/add_posts.json",
       data: {post_ids: [post_id]},
     }).fail(function (data) {
-      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join('; ');
+      var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join('; ');
       Post.notice_update("dec");
       $(window).trigger('danbooru:error', "Error: " + message);
     }).done(function () {
@@ -32,7 +32,7 @@ PostSet.remove_post = function (set_id, post_id) {
       url: "/post_sets/" + set_id + "/remove_posts.json",
       data: {post_ids: [post_id]},
     }).fail(function (data) {
-      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join('; ');
+      var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join('; ');
       Post.notice_update("dec");
       $(window).trigger('danbooru:error', "Error: " + message);
     }).done(function () {
diff --git a/app/javascript/src/javascripts/post_versions.js b/app/javascript/src/javascripts/post_versions.js
index 2ba134128..5f7a59850 100644
--- a/app/javascript/src/javascripts/post_versions.js
+++ b/app/javascript/src/javascripts/post_versions.js
@@ -22,11 +22,11 @@ PostVersion.initialize_undo = function () {
     $(event.target).find(".post-version-select:not(:disabled)").prop("checked", (_, checked) => !checked).change();
   });
 
-  $("#post-version-select-all").on("change.danbooru", function (event) {
+  $("#post-version-select-all").on("change.danbooru", function () {
     $(".post-version-select:not(:disabled)").prop("checked", $("#post-version-select-all").prop("checked")).change();
   });
 
-  $(".post-version-select").on("change.danbooru", function (event) {
+  $(".post-version-select").on("change.danbooru", function () {
     let checked = $(".post-version-select:checked");
     $("#subnav-undo-selected-link").text(`Undo selected (${checked.length})`).toggle(checked.length > 0);
   });
diff --git a/app/javascript/src/javascripts/posts.js b/app/javascript/src/javascripts/posts.js
index a69f2d937..431570c8d 100644
--- a/app/javascript/src/javascripts/posts.js
+++ b/app/javascript/src/javascripts/posts.js
@@ -106,7 +106,7 @@ Post.open_edit_dialog = function() {
       at: "right-20",
       of: window
     },
-    drag: function(e, ui) {
+    drag: function() {
       if (Utility.meta("enable-auto-complete") === "true") {
         $tag_string.data("uiAutocomplete").close();
       }
@@ -118,7 +118,7 @@ Post.open_edit_dialog = function() {
   var pin_button = $("<button/>").button({icons: {primary: "ui-icon-pin-w"}, label: "pin", text: false});
   pin_button.css({width: "20px", height: "20px", position: "absolute", right: "28.4px"});
   dialog.parent().children(".ui-dialog-titlebar").append(pin_button);
-  pin_button.on("click.danbooru", function(e) {
+  pin_button.on("click.danbooru", function() {
     var dialog_widget = $('.ui-dialog:has(#edit-dialog)');
     var pos = dialog_widget.offset();
 
@@ -139,9 +139,9 @@ Post.open_edit_dialog = function() {
     }
   });
 
-  dialog.parent().mouseout(function(e) {
+  dialog.parent().mouseout(function() {
     dialog.parent().css({"opacity": 0.6, "transition": "opacity .4s ease"});
-  }).mouseover(function(e) {
+  }).mouseover(function() {
     dialog.parent().css({"opacity": 1, "transition": "opacity .2s ease"});
   });
 
@@ -149,7 +149,7 @@ Post.open_edit_dialog = function() {
   $tag_string.focus().selectEnd().height($tag_string[0].scrollHeight);
 }
 
-Post.close_edit_dialog = function(e, ui) {
+Post.close_edit_dialog = function() {
   $("#form").appendTo($("#c-posts #edit,#c-uploads #a-new"));
   $("#edit-dialog").remove();
   var $tag_string = $("#post_tag_string");
@@ -225,7 +225,7 @@ class E6Swipe extends ZingTouch.Swipe {
       const dist = distanceBetweenTwoPoints([acc.last.x, acc.last.y], [move.x, move.y]);
       return {vel: acc.vel + vel, angle: [acc.angle[0] + Math.cos(angle), acc.angle[1] + Math.sin(angle)], dist: acc.dist + dist, last: move};
     }, {vel: 0, angle: 0, dist: 0, last: null});
-    const initial = input.initial;
+    // const initial = input.initial;
     // Add total gesture motion as a bias.
 //    totals.vel += getVelocity([initial.x, initial.y, initial.time], [input.current.x, input.current.y, input.current.time]);
 //    totals.angle += getAngle([initial.x, initial.y], [input.current.x, input.current.y]) + Math.PI;
@@ -387,7 +387,7 @@ Post.initialize_links = function() {
         data: {
           other_post_id: other_post_id
         },
-        success: function(data) {
+        success: function() {
           $(window).trigger("danbooru:notice", "Successfully copied notes to <a href='" + other_post_id + "'>post #" + other_post_id + "</a>");
         },
         error: function(data) {
@@ -481,9 +481,8 @@ Post.resize_video = function (post, target_size) {
 
   function original_sources() {
     target_sources.push({type: 'video/webm', url: post?.file?.url});
-    if (typeof post?.sample?.alternates?.original !== 'unknown') {
+    if (typeof post?.sample?.alternates?.original !== "undefined")
       target_sources.push({type: 'video/mp4', url: post?.sample?.alternates?.original?.urls[1]});
-    }
   }
 
   switch (target_size) {
@@ -498,7 +497,7 @@ Post.resize_video = function (post, target_size) {
       original_sources();
       desired_classes.push('fit-window-vertical');
       break;
-    default:
+    default: {
       $notice.show();
       const alternate = post?.sample?.alternates[target_size];
       target_sources.push({type: 'video/webm; codecs="vp9"', url: alternate.urls[0]});
@@ -506,6 +505,7 @@ Post.resize_video = function (post, target_size) {
       desired_classes.push('fit-window');
       update_resize_percentage(post?.sample?.alternates[target_size]?.width, post?.file?.width);
       break;
+    }
   }
   $video.removeClass();
   $video.empty(); // Yank any sources out of the list to prevent browsers from being pants on head.
@@ -644,7 +644,7 @@ Post.initialize_resize = function () {
         Post.resize_notes();
     }
 
-    $image.on('load', function (e) {
+    $image.on('load', function () {
       Post.resize_notes();
       $("#image-container").removeClass("image-loading");
     });
@@ -749,7 +749,7 @@ Post.update = function(post_id, params) {
         Post.notice_update("dec");
         Post.update_data(data);
       },
-      error: function(data) {
+      error: function() {
         Post.notice_update("dec");
         $(window).trigger("danbooru:error", 'There was an error updating <a href="/posts/' + post_id + '">post #' + post_id + '</a>');
       }
@@ -765,9 +765,9 @@ Post.delete_with_reason = function(post_id, reason, reload_after_delete) {
       url: `/moderator/post/posts/${post_id}/delete.json`,
       data: {commit: "Delete", reason: reason, move_favorites: true}
     }).fail(function(data) {
-      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join('; ');
+      var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join('; ');
       $(window).trigger('danbooru:error', "Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       $(window).trigger("danbooru:notice", "Deleted post.");
       if(reload_after_delete) {
         location.reload();
@@ -790,7 +790,7 @@ Post.undelete = function(post_id, callback) {
 //      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join('; ');
       const message = data.responseJSON.message;
       $(window).trigger('danbooru:error', "Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       $(window).trigger("danbooru:notice", "Undeleted post.");
       $(`article#post_${post_id}`).attr('data-flags', 'active');
       if(callback) callback();
@@ -811,7 +811,7 @@ Post.unflag = function(post_id, approval, reload = true) {
     }).fail(function(data) {
       const message = data.responseJSON.message;
       $(window).trigger('danbooru:error', "Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       $(window).trigger("danbooru:notice", "Unflagged post");
       if (reload) {
         location.reload();
@@ -830,9 +830,9 @@ Post.unapprove = function(post_id) {
       url: "/moderator/post/approval.json",
       data: {post_id: post_id}
     }).fail(function(data) {
-      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join('; ');
+      var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join('; ');
       $(window).trigger('danbooru:error', "Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       $(window).trigger("danbooru:notice", "Unapproved post.");
       location.reload();
     }).always(function() {
@@ -844,9 +844,9 @@ Post.unapprove = function(post_id) {
 Post.destroy = function(post_id, reason) {
   $.post(`/moderator/post/posts/${post_id}/expunge.json`, { reason }
   ).fail(data => {
-    var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join("; ");
+    var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join("; ");
     $(window).trigger("danbooru:error", "Error: " + message);
-  }).done(data => {
+  }).done(() => {
     location.href = `/admin/destroyed_posts/${post_id}`;
   });
 };
@@ -855,7 +855,7 @@ Post.regenerate_image_samples = function(post_id) {
   $.post(`/moderator/post/posts/${post_id}/regenerate_thumbnails.json`, {}
   ).fail(data => {
     Utility.error("Error: " + data.responseJSON.reason);
-  }).done(data => {
+  }).done(() => {
     Utility.notice("Image samples regenerated.");
   });
 };
@@ -864,7 +864,7 @@ Post.regenerate_video_samples = function(post_id) {
   $.post(`/moderator/post/posts/${post_id}/regenerate_videos.json`, {}
   ).fail(data => {
     Utility.error("Error: " + data.responseJSON.reason);
-  }).done(data => {
+  }).done(() => {
     Utility.notice("Video samples will be regenerated in a few minutes.");
   });
 };
@@ -876,9 +876,9 @@ Post.approve = function(post_id, callback) {
       "/moderator/post/approval.json",
       { "post_id": post_id }
     ).fail(function(data) {
-      const message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join("; ");
+      const message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join("; ");
       Danbooru.error("Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       var $post = $("#post_" + post_id);
       if ($post.length) {
         $post.data("flags", $post.data("flags").replace(/pending/, ""));
@@ -901,9 +901,9 @@ Post.disapprove = function(post_id, reason, message) {
       "/moderator/post/disapprovals.json",
       {"post_disapproval[post_id]": post_id, "post_disapproval[reason]": reason, "post_disapproval[message]": message}
     ).fail(function(data) {
-      var message = $.map(data.responseJSON.errors, function(msg, attr) { return msg; }).join("; ");
+      var message = $.map(data.responseJSON.errors, function(msg) { return msg; }).join("; ");
       $(window).trigger("danbooru:error", "Error: " + message);
-    }).done(function(data) {
+    }).done(function() {
       if ($("#c-posts #a-show").length) {
         location.reload();
       }
@@ -916,7 +916,7 @@ Post.disapprove = function(post_id, reason, message) {
 Post.update_tag_count = function(event) {
   let string = "0 tags";
   let count = 0;
-  let count2 = 1;
+  // let count2 = 1;
 
   if (event) {
     let tags = [...new Set($(event.target).val().match(/\S+/g))];
@@ -994,7 +994,7 @@ Post.set_as_avatar = function(id) {
       headers: {
         accept: '*/*;q=0.5,text/javascript'
       }
-    }).done(function(data) {
+    }).done(function() {
       $(window).trigger("danbooru:notice", "Post set as avatar");
     });
   });
diff --git a/app/javascript/src/javascripts/tag_relationships.js b/app/javascript/src/javascripts/tag_relationships.js
index cdecfa436..7fe617eb7 100644
--- a/app/javascript/src/javascripts/tag_relationships.js
+++ b/app/javascript/src/javascripts/tag_relationships.js
@@ -17,10 +17,10 @@ class TagRelationships {
       url: `/${route}/${id}/approve.json`,
       type: 'POST',
       dataType: 'json'
-    }).done(function (data) {
+    }).done(function () {
       Utility.notice(`Accepted ${human}.`);
       parent.slideUp('fast');
-    }).fail(function (data) {
+    }).fail(function () {
       Utility.error(`Failed to accept ${human}.`);
     });
   }
@@ -41,10 +41,10 @@ class TagRelationships {
       url: `/${route}/${id}.json`,
       type: 'DELETE',
       dataType: 'json'
-    }).done(function (data) {
+    }).done(function () {
       Utility.notice(`Rejected ${human}.`);
       parent.slideUp('fast');
-    }).fail(function (data) {
+    }).fail(function () {
       Utility.error(`Failed to reject ${human}.`);
     });
   }
diff --git a/app/javascript/src/javascripts/takedowns.js b/app/javascript/src/javascripts/takedowns.js
index 864dd3771..885ce9f61 100644
--- a/app/javascript/src/javascripts/takedowns.js
+++ b/app/javascript/src/javascripts/takedowns.js
@@ -13,7 +13,7 @@ Takedown.destroy = function (id) {
     data: {
       "id": id
     }
-  }).done(function (data) {
+  }).done(function () {
     Utility.notice("Takedown deleted");
     $("#takedown-" + id).fadeOut("fast");
   }).fail(function (data) {
@@ -128,7 +128,7 @@ Takedown.remove_post = function (id, post_id) {
       id: id,
       post_ids: post_id
     }
-  }).done(function (data) {
+  }).done(function () {
     Utility.notice("Post #" + post_id + " removed from takedown")
     $("#takedown-post-" + post_id).remove();
   }).fail(function (data) {
diff --git a/app/javascript/src/javascripts/user_warning.js b/app/javascript/src/javascripts/user_warning.js
index 657557d34..c94251ddf 100644
--- a/app/javascript/src/javascripts/user_warning.js
+++ b/app/javascript/src/javascripts/user_warning.js
@@ -36,7 +36,7 @@ class UserWarnable {
         Comment.reinitialize_all();
         ForumPost.reinitialize_all();
         DText.initialize_all_inputs();
-      }).fail(data => {
+      }).fail(() => {
         Utility.error("Failed to mark as warned.");
       });
     });
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 38b23b7fe..e74b3cd56 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -18,7 +18,7 @@ export default [
       "@stylistic/js": stylistic,
     },
     rules: {
-      "no-unused-vars": "off",
+      "no-unused-vars": "warn",
 
       // https://eslint.style/packages/js
       /*