minor fixes

1-js/02-first-steps/16-function-expressions/article.md

@@ -194,7 +194,7 @@ First, the syntax: how to differentiate between them in the code.
       return a + b;
     }
     ```
-- *Function Expression:* a function, created inside an expression or inside another syntax construct. Here, the function is created at the right side of the "assignment expression" `=`:
+- *Function Expression:* a function, created inside an expression or inside another syntax construct. Here, the function is created on the right side of the "assignment expression" `=`:
 
     ```js
     // Function Expression

1-js/02-first-steps/18-javascript-specials/article.md

@@ -256,7 +256,7 @@ We covered three ways to create a function in JavaScript:
 3. Arrow functions:
 
     ```js
-    // expression at the right side
+    // expression on the right side
     let sum = (a, b) => a + b;
 
     // or multi-line syntax with { ... }, need return here:

1-js/04-object-basics/07-optional-chaining/article.md

@@ -206,7 +206,7 @@ delete user?.name; // delete user.name if user exists
 ```
 
 ````warn header="We can use `?.` for safe reading and deleting, but not writing"
-The optional chaining `?.` has no use at the left side of an assignment.
+The optional chaining `?.` has no use on the left side of an assignment.
 
 For example:
 ```js run

1-js/05-data-types/10-destructuring-assignment/article.md

@@ -81,7 +81,7 @@ That works, because internally a destructuring assignment works by iterating ove
 
 
 ````smart header="Assign to anything at the left-side"
-We can use any "assignables" at the left side.
+We can use any "assignables" on the left side.
 
 For instance, an object property:
 ```js run
@@ -234,7 +234,7 @@ The basic syntax is:
 let {var1, var2} = {var1:…, var2:…}
 ```
 
-We should have an existing object at the right side, that we want to split into variables. The left side contains an object-like "pattern" for corresponding properties. In the simplest case, that's a list of variable names in `{...}`.
+We should have an existing object on the right side, that we want to split into variables. The left side contains an object-like "pattern" for corresponding properties. In the simplest case, that's a list of variable names in `{...}`.
 
 For instance:
 
@@ -420,7 +420,7 @@ alert( title ); // Menu
 
 If an object or an array contain other nested objects and arrays, we can use more complex left-side patterns to extract deeper portions.
 
-In the code below `options` has another object in the property `size` and an array in the property `items`. The pattern at the left side of the assignment has the same structure to extract values from them:
+In the code below `options` has another object in the property `size` and an array in the property `items`. The pattern on the left side of the assignment has the same structure to extract values from them:
 
 ```js run
 let options = {