diff --git a/files/ru/_redirects.txt b/files/ru/_redirects.txt
index edb1130806ac9e..69a4da5f7a4d6c 100644
--- a/files/ru/_redirects.txt
+++ b/files/ru/_redirects.txt
@@ -753,7 +753,12 @@
 /ru/docs/Web/JavaScript/Reference/Classes/Private_class_fields	/ru/docs/Web/JavaScript/Reference/Classes/Private_properties
 /ru/docs/Web/JavaScript/Reference/Classes/Приватные_поля_класса	/ru/docs/Web/JavaScript/Reference/Classes/Private_properties
 /ru/docs/Web/JavaScript/Reference/Errors/Bad_return_or_yield	/ru/docs/Web/JavaScript/Reference/Errors/Bad_return
+/ru/docs/Web/JavaScript/Reference/Errors/Deprecated_octal	/ru/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_literal
+/ru/docs/Web/JavaScript/Reference/Errors/Equal_as_assign	/ru/docs/orphaned/Web/JavaScript/Reference/Errors/Equal_as_assign
+/ru/docs/Web/JavaScript/Reference/Errors/Missing_semicolon_before_statement	/ru/docs/conflicting/Web/JavaScript/Reference/Errors/Unexpected_token
 /ru/docs/Web/JavaScript/Reference/Errors/Not_a_codepoint	/ru/docs/Web/JavaScript/Reference/Errors/Not_a_valid_code_point
+/ru/docs/Web/JavaScript/Reference/Errors/Undefined_prop	/ru/docs/orphaned/Web/JavaScript/Reference/Errors/Undefined_prop
+/ru/docs/Web/JavaScript/Reference/Errors/Unterminated_string_literal	/ru/docs/Web/JavaScript/Reference/Errors/String_literal_EOL
 /ru/docs/Web/JavaScript/Reference/Functions/Определиние_методов	/ru/docs/Web/JavaScript/Reference/Functions/Method_definitions
 /ru/docs/Web/JavaScript/Reference/Global_Objects/Array/contains	/ru/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
 /ru/docs/Web/JavaScript/Reference/Global_Objects/Collator	/ru/docs/Web/JavaScript/Reference/Global_Objects/Intl/Collator
diff --git a/files/ru/_wikihistory.json b/files/ru/_wikihistory.json
index 2cab33d2522ae9..dd105c5c356d30 100644
--- a/files/ru/_wikihistory.json
+++ b/files/ru/_wikihistory.json
@@ -11884,7 +11884,7 @@
     "modified": "2020-03-12T19:48:07.207Z",
     "contributors": ["simonprod", "MakarovDs777", "Akh-rman"]
   },
-  "Web/JavaScript/Reference/Errors/Deprecated_octal": {
+  "Web/JavaScript/Reference/Errors/Deprecated_octal_literal": {
     "modified": "2020-03-12T19:48:36.042Z",
     "contributors": ["MakarovDs777", "ialexi-bl"]
   },
@@ -11892,10 +11892,6 @@
     "modified": "2020-03-12T19:46:14.659Z",
     "contributors": ["medianex"]
   },
-  "Web/JavaScript/Reference/Errors/Equal_as_assign": {
-    "modified": "2020-03-12T19:48:37.445Z",
-    "contributors": ["MakarovDs777"]
-  },
   "Web/JavaScript/Reference/Errors/Getter_only": {
     "modified": "2020-03-12T19:48:43.409Z",
     "contributors": ["MakarovDs777"]
@@ -11976,10 +11972,6 @@
     "modified": "2020-03-12T19:47:08.319Z",
     "contributors": ["thepocp"]
   },
-  "Web/JavaScript/Reference/Errors/Missing_semicolon_before_statement": {
-    "modified": "2020-03-12T19:46:03.538Z",
-    "contributors": ["KTatyana", "SedovDP", "Sparks"]
-  },
   "Web/JavaScript/Reference/Errors/More_arguments_needed": {
     "modified": "2020-03-12T19:46:14.923Z",
     "contributors": ["thepocp"]
@@ -12071,6 +12063,10 @@
     "modified": "2020-03-12T19:48:33.429Z",
     "contributors": ["ialexi-bl", "MakarovDs777"]
   },
+  "Web/JavaScript/Reference/Errors/String_literal_EOL": {
+    "modified": "2020-03-12T19:48:38.047Z",
+    "contributors": ["MakarovDs777"]
+  },
   "Web/JavaScript/Reference/Errors/Too_much_recursion": {
     "modified": "2020-03-12T19:46:15.435Z",
     "contributors": ["thepocp"]
@@ -12079,10 +12075,6 @@
     "modified": "2020-03-12T19:47:38.776Z",
     "contributors": ["Akh-rman", "Matthew11770"]
   },
-  "Web/JavaScript/Reference/Errors/Undefined_prop": {
-    "modified": "2020-03-12T19:47:58.221Z",
-    "contributors": ["KTatyana"]
-  },
   "Web/JavaScript/Reference/Errors/Unexpected_token": {
     "modified": "2020-03-12T19:46:02.532Z",
     "contributors": ["KTatyana", "NemchinovSergey", "Sparks"]
@@ -12095,10 +12087,6 @@
     "modified": "2020-03-12T19:48:37.361Z",
     "contributors": ["Akh-rman", "MakarovDs777"]
   },
-  "Web/JavaScript/Reference/Errors/Unterminated_string_literal": {
-    "modified": "2020-03-12T19:48:38.047Z",
-    "contributors": ["MakarovDs777"]
-  },
   "Web/JavaScript/Reference/Errors/in_operator_no_object": {
     "modified": "2020-03-12T19:48:40.403Z",
     "contributors": ["MakarovDs777"]
@@ -15970,8 +15958,20 @@
     "modified": "2019-03-18T20:41:47.756Z",
     "contributors": ["Dozorengel", "KishiTako"]
   },
+  "conflicting/Web/JavaScript/Reference/Errors/Unexpected_token": {
+    "modified": "2020-03-12T19:46:03.538Z",
+    "contributors": ["KTatyana", "SedovDP", "Sparks"]
+  },
   "conflicting/Web/SVG/Attribute": {
     "modified": "2020-10-15T22:34:58.576Z",
     "contributors": ["osipov_s"]
+  },
+  "orphaned/Web/JavaScript/Reference/Errors/Equal_as_assign": {
+    "modified": "2020-03-12T19:48:37.445Z",
+    "contributors": ["MakarovDs777"]
+  },
+  "orphaned/Web/JavaScript/Reference/Errors/Undefined_prop": {
+    "modified": "2020-03-12T19:47:58.221Z",
+    "contributors": ["KTatyana"]
   }
 }
diff --git a/files/ru/web/javascript/reference/errors/missing_semicolon_before_statement/index.md b/files/ru/conflicting/web/javascript/reference/errors/unexpected_token/index.md
similarity index 95%
rename from files/ru/web/javascript/reference/errors/missing_semicolon_before_statement/index.md
rename to files/ru/conflicting/web/javascript/reference/errors/unexpected_token/index.md
index 668dacab8ba88a..37f593c61dab65 100644
--- a/files/ru/web/javascript/reference/errors/missing_semicolon_before_statement/index.md
+++ b/files/ru/conflicting/web/javascript/reference/errors/unexpected_token/index.md
@@ -1,6 +1,7 @@
 ---
 title: "SyntaxError: missing ; before statement"
-slug: Web/JavaScript/Reference/Errors/Missing_semicolon_before_statement
+slug: conflicting/Web/JavaScript/Reference/Errors/Unexpected_token
+original_slug: Web/JavaScript/Reference/Errors/Missing_semicolon_before_statement
 ---
 
 {{jsSidebar("Errors")}}
diff --git a/files/ru/web/javascript/reference/errors/equal_as_assign/index.md b/files/ru/orphaned/web/javascript/reference/errors/equal_as_assign/index.md
similarity index 94%
rename from files/ru/web/javascript/reference/errors/equal_as_assign/index.md
rename to files/ru/orphaned/web/javascript/reference/errors/equal_as_assign/index.md
index 3711e602a39c52..af44799a3859d3 100644
--- a/files/ru/web/javascript/reference/errors/equal_as_assign/index.md
+++ b/files/ru/orphaned/web/javascript/reference/errors/equal_as_assign/index.md
@@ -1,6 +1,7 @@
 ---
 title: "SyntaxError: test for equality (==) mistyped as assignment (=)?(тест на равенство (==) опечатка как присваивание (=)?)"
-slug: Web/JavaScript/Reference/Errors/Equal_as_assign
+slug: orphaned/Web/JavaScript/Reference/Errors/Equal_as_assign
+original_slug: Web/JavaScript/Reference/Errors/Equal_as_assign
 ---
 
 {{jsSidebar("Errors")}}
diff --git a/files/ru/web/javascript/reference/errors/undefined_prop/index.md b/files/ru/orphaned/web/javascript/reference/errors/undefined_prop/index.md
similarity index 91%
rename from files/ru/web/javascript/reference/errors/undefined_prop/index.md
rename to files/ru/orphaned/web/javascript/reference/errors/undefined_prop/index.md
index f224c2fb7df68c..2923c2065d6c98 100644
--- a/files/ru/web/javascript/reference/errors/undefined_prop/index.md
+++ b/files/ru/orphaned/web/javascript/reference/errors/undefined_prop/index.md
@@ -1,6 +1,7 @@
 ---
-title: 'ReferenceError: reference to undefined property "x"'
-slug: Web/JavaScript/Reference/Errors/Undefined_prop
+title: "ReferenceError: reference to undefined property \"x\""
+slug: orphaned/Web/JavaScript/Reference/Errors/Undefined_prop
+original_slug: Web/JavaScript/Reference/Errors/Undefined_prop
 ---
 
 {{jsSidebar("Errors")}}
diff --git a/files/ru/web/javascript/reference/errors/deprecated_octal/index.md b/files/ru/web/javascript/reference/errors/deprecated_octal_literal/index.md
similarity index 93%
rename from files/ru/web/javascript/reference/errors/deprecated_octal/index.md
rename to files/ru/web/javascript/reference/errors/deprecated_octal_literal/index.md
index 194b441530d27f..8993e0e501263a 100644
--- a/files/ru/web/javascript/reference/errors/deprecated_octal/index.md
+++ b/files/ru/web/javascript/reference/errors/deprecated_octal_literal/index.md
@@ -1,6 +1,7 @@
 ---
-title: 'SyntaxError: "0"-prefixed octal literals and octal escape seq. are deprecated'
-slug: Web/JavaScript/Reference/Errors/Deprecated_octal
+title: "SyntaxError: \"0\"-prefixed octal literals and octal escape seq. are deprecated"
+slug: Web/JavaScript/Reference/Errors/Deprecated_octal_literal
+original_slug: Web/JavaScript/Reference/Errors/Deprecated_octal
 ---
 
 {{jsSidebar("Errors")}}
diff --git a/files/ru/web/javascript/reference/errors/unterminated_string_literal/index.md b/files/ru/web/javascript/reference/errors/string_literal_eol/index.md
similarity index 96%
rename from files/ru/web/javascript/reference/errors/unterminated_string_literal/index.md
rename to files/ru/web/javascript/reference/errors/string_literal_eol/index.md
index 31435b6b1573cb..3ec8d3ac1105d6 100644
--- a/files/ru/web/javascript/reference/errors/unterminated_string_literal/index.md
+++ b/files/ru/web/javascript/reference/errors/string_literal_eol/index.md
@@ -1,6 +1,7 @@
 ---
 title: "SyntaxError: unterminated string literal"
-slug: Web/JavaScript/Reference/Errors/Unterminated_string_literal
+slug: Web/JavaScript/Reference/Errors/String_literal_EOL
+original_slug: Web/JavaScript/Reference/Errors/Unterminated_string_literal
 l10n:
   sourceCommit: d71b141d2d18b96639547856714df19cefacfebf
 ---
@@ -66,8 +67,8 @@ const longString =
 Ещё одна возможность — использовать [шаблонные строки](/ru/docs/Web/JavaScript/Reference/Template_literals):
 
 ```js example-good
-const longString = `Это очень длинная строка, которую 
-необходимо разбивать на несколько строк, 
+const longString = `Это очень длинная строка, которую
+необходимо разбивать на несколько строк,
 потому что иначе её трудно читать.`;
 ```