Fix examples in CookieStore interface (#31001)

files/en-us/web/api/cookiestore/delete/index.md

@@ -54,10 +54,11 @@ A {{jsxref("Promise")}} that resolves with {{jsxref("undefined")}} when deletion
 
 ## Examples
 
-In this example a cookie is deleted by passing the name to the `delete()` method.
+In this example, a cookie is deleted by passing the name to the `delete()` method.
 
 ```js
-let result = cookieStore.delete("cookie1");
+const result = cookieStore.delete("cookie1");
+
 console.log(result);
 ```
 

files/en-us/web/api/cookiestore/get/index.md

@@ -88,10 +88,11 @@ A {{jsxref("Promise")}} that resolves with an object representing the first cook
 
 ## Examples
 
-In this example we return a cookie named "cookie1". If the cookie is found the result of the Promise is an object containing the details of a single cookie.
+In this example, we return a cookie named "cookie1". If the cookie is found the result of the Promise is an object containing the details of a single cookie.
 
 ```js
-let cookie = cookieStore.get("cookie1");
+const cookie = await cookieStore.get("cookie1");
+
 if (cookie) {
   console.log(cookie);
 } else {

files/en-us/web/api/cookiestore/getall/index.md

@@ -88,11 +88,12 @@ Each object contains the following properties:
 
 ## Examples
 
-In this example we use `getAll()` with no parameters. This returns all of the cookies for this context as an array of objects.
+In this example, we use `getAll()` with no parameters. This returns all of the cookies for this context as an array of objects.
 
 ```js
-let cookies = await cookieStore.getAll();
-if (cookies) {
+const cookies = await cookieStore.getAll();
+
+if (cookies.length > 0) {
   console.log(cookies);
 } else {
   console.log("Cookie not found");

files/en-us/web/api/cookiestore/index.md

@@ -33,7 +33,7 @@ The `CookieStore` is accessed via attributes in the global scope in a {{domxref(
 
 ## Examples
 
-In this example we set a cookie and write to the console feedback as to whether the operation succeeded or failed.
+In this example, we set a cookie and write to the console feedback as to whether the operation succeeded or failed.
 
 ```js
 const day = 24 * 60 * 60 * 1000;

files/en-us/web/api/cookiestore/set/index.md

@@ -75,6 +75,7 @@ The following example sets a cookie by passing an object with `name`, `value`, `
 
 ```js
 const day = 24 * 60 * 60 * 1000;
+
 cookieStore.set({
   name: "cookie1",
   value: "cookie1-value",