diff --git a/1-js/02-first-steps/11-logical-operators/article.md b/1-js/02-first-steps/11-logical-operators/article.md
index 0842bf339b..97f5d738ab 100644
--- a/1-js/02-first-steps/11-logical-operators/article.md
+++ b/1-js/02-first-steps/11-logical-operators/article.md
@@ -64,7 +64,7 @@ if (hour < 10 || hour > 18 || isWeekend) {
 }
 ```
 
-## OR "||" finds the first truthy value
+## OR "||" finds the first truthy value [#or-finds-the-first-truthy-value]
 
 The logic described above is somewhat classical. Now, let's bring in the "extra" features of JavaScript.
 
diff --git a/1-js/04-object-basics/02-object-copy/article.md b/1-js/04-object-basics/02-object-copy/article.md
index 52af1bdc59..318fc04a4a 100644
--- a/1-js/04-object-basics/02-object-copy/article.md
+++ b/1-js/04-object-basics/02-object-copy/article.md
@@ -100,7 +100,7 @@ alert( a == b ); // false
 
 For comparisons like `obj1 > obj2` or for a comparison against a primitive `obj == 5`, objects are converted to primitives. We'll study how object conversions work very soon, but to tell the truth, such comparisons are needed very rarely -- usually they appear as a result of a programming mistake.
 
-## Cloning and merging, Object.assign
+## Cloning and merging, Object.assign [#cloning-and-merging-object-assign]
 
 So, copying an object variable creates one more reference to the same object.
 
diff --git a/1-js/05-data-types/03-string/article.md b/1-js/05-data-types/03-string/article.md
index 4b8e8aa8a4..d5bda96907 100644
--- a/1-js/05-data-types/03-string/article.md
+++ b/1-js/05-data-types/03-string/article.md
@@ -528,7 +528,7 @@ The characters are compared by their numeric code. The greater code means that t
 - All lowercase letters go after uppercase letters because their codes are greater.
 - Some letters like `Ö` stand apart from the main alphabet. Here, it's code is greater than anything from `a` to `z`.
 
-### Correct comparisons
+### Correct comparisons [#correct-comparisons]
 
 The "right" algorithm to do string comparisons is more complex than it may seem, because alphabets are different for different languages.
 
diff --git a/1-js/09-classes/03-static-properties-methods/article.md b/1-js/09-classes/03-static-properties-methods/article.md
index ab08f2ded5..c75ec257fc 100644
--- a/1-js/09-classes/03-static-properties-methods/article.md
+++ b/1-js/09-classes/03-static-properties-methods/article.md
@@ -125,7 +125,7 @@ That is the same as a direct assignment to `Article`:
 Article.publisher = "Ilya Kantor";
 ```
 
-## Inheritance of static properties and methods
+## Inheritance of static properties and methods [#statics-and-inheritance]
 
 Static properties and methods are inherited.