diff --git a/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md b/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
index 7f364b9b4ed..92014235f4b 100644
--- a/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/react/give-sibling-elements-a-unique-key-attribute.english.md
@@ -7,12 +7,12 @@ isRequired: false
## Description
map
method is used to dynamically render a number of elements based on user input. However, there was an important piece missing from that example. When you create an array of elements, each one needs a key
attribute set to a unique value. React uses these keys to keep track of which items are added, changed, or removed. This helps make the re-rendering process more efficient when the list is modified in any way. Note that keys only need to be unique between sibling elements, they don't need to be globally unique in your application.
+The last challenge showed how the map
method is used to dynamically render a number of elements based on user input. However, there was an important piece missing from that example. When you create an array of elements, each one needs a key
attribute set to a unique value. React uses these keys to keep track of which items are added, changed, or removed. This helps make the re-rendering process more efficient when the list is modified in any way.
Note: Keys only need to be unique between sibling elements, they don't need to be globally unique in your application.
Frameworks()
. Frameworks()
needs to map the array to an unordered list, much like in the last challenge. Finish writing the map
callback to return an li
element for each framework in the frontEndFrameworks
array. This time, make sure to give each li
a key
attribute, set to a unique value.
+The code editor has an array with some front end frameworks and a stateless functional component named Frameworks()
. Frameworks()
needs to map the array to an unordered list, much like in the last challenge. Finish writing the map
callback to return an li
element for each framework in the frontEndFrameworks
array. This time, make sure to give each li
a key
attribute, set to a unique value. The li
elements should also contain text from frontEndFrameworks
.
Normally, you want to make the key something that uniquely identifies the element being rendered. As a last resort the array index may be used, but typically you should try to use a unique identification.
ul
tag should render 6 child li
elements.');
- text: Each list item element should have a unique key
attribute.
testString: assert((() => { const ul = Enzyme.mount(React.createElement(Frameworks)).find('ul'); const keys = new Set([ ul.childAt(0).key(), ul.childAt(1).key(), ul.childAt(2).key(), ul.childAt(3).key(), ul.childAt(4).key(), ul.childAt(5).key(), ]); return keys.size === 6; })(), 'Each list item element should have a unique key
attribute.');
+ - text: Each list item element should contain text from frontEndFrameworks
.
+ testString: assert((() => {const li = Enzyme.mount(React.createElement(Frameworks)).find('ul').children(); return [...Array(5)].every((_, i) => frontEndFrameworks.includes(li.at(i).text()))})(), 'Each list item element should contain text from frontEndFrameworks
{
- return