Skip to content
This repository was archived by the owner on Sep 10, 2025. It is now read-only.

Commit 544219d

Browse files
openrocketsofficialopenrocketsofficial
committed
updated
1 parent 4d37026 commit 544219d

File tree

4 files changed

+72
-108
lines changed

4 files changed

+72
-108
lines changed

‎body.txt‎

Lines changed: 49 additions & 80 deletions
Original file line numberDiff line numberDiff line change
@@ -1,102 +1,71 @@
11

2-
**Description of the Error:**
2+
This challenge focuses on creating a responsive image gallery using CSS Grid. The goal is to build a gallery that dynamically adjusts its layout to fit different screen sizes, displaying images in a visually appealing and organized manner. We'll be using plain CSS (CSS3) for this example, although the concepts could easily be adapted to Tailwind CSS.
33

4-
A common problem when working with Firebase Firestore and applications involving posts (like blog posts, social media updates, etc.) is performance degradation as the number of posts grows. Inefficient data structuring and querying can lead to slow load times, high latency, and ultimately, a poor user experience. Specifically, attempting to query large collections directly using `where` clauses on fields within nested objects or deeply structured documents can result in slow queries and potentially exceed Firestore's query limits. This often manifests as slow loading times for feeds or search results.
4+
## Description of the Styling:
55

6-
**Fixing the Problem Step-by-Step:**
6+
The gallery will display images in a grid layout. On larger screens, it will show a certain number of images per row. As the screen size decreases, the number of images per row will automatically adjust to maintain a responsive design. We aim for a clean, modern look with consistent spacing between images. Images will maintain their aspect ratio.
77

8-
This solution focuses on using a combination of techniques to improve performance: data denormalization and proper indexing.
98

10-
**1. Data Modeling:**
9+
## Full Code:
1110

12-
Instead of embedding all post details (like comments, likes, user information) within a single `posts` collection, we'll denormalize the data. This means storing frequently accessed data redundantly in multiple locations for faster access.
13-
14-
**2. Collection Structure:**
15-
16-
We'll use two main collections:
17-
18-
* **`posts`:** This collection stores the core post information. Each document represents a single post with an ID. Only essential data like title, author ID (a reference), timestamp, and a short summary will be stored here.
19-
* **`postDetails`:** This collection stores detailed information about each post. The document ID will be the same as the corresponding post in the `posts` collection. This will contain details like the full post content, comments, and likes.
20-
21-
**3. Code Implementation (using JavaScript/Node.js):**
22-
23-
```javascript
24-
// Import the Firebase Admin SDK
25-
const admin = require('firebase-admin');
26-
admin.initializeApp();
27-
const db = admin.firestore();
28-
29-
// Function to add a new post
30-
async function addPost(postData) {
31-
const postRef = db.collection('posts').doc();
32-
const postId = postRef.id;
33-
const postDetailsRef = db.collection('postDetails').doc(postId);
34-
35-
const post = {
36-
title: postData.title,
37-
authorId: postData.authorId, //Reference to the user document
38-
timestamp: admin.firestore.FieldValue.serverTimestamp(),
39-
summary: postData.summary,
40-
};
41-
42-
const postDetails = {
43-
content: postData.content,
44-
comments: [], //Initialize empty array
45-
likes: [], //Initialize empty array
46-
};
47-
48-
await Promise.all([
49-
postRef.set(post),
50-
postDetailsRef.set(postDetails),
51-
]);
52-
53-
console.log('Post added:', postId);
11+
```html
12+
<!DOCTYPE html>
13+
<html>
14+
<head>
15+
<title>Responsive Image Gallery</title>
16+
<style>
17+
.gallery {
18+
display: grid;
19+
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Adjust minmax value for image width */
20+
grid-gap: 20px; /* Adjust gap as needed */
5421
}
5522

23+
.gallery img {
24+
width: 100%;
25+
height: auto;
26+
display: block; /* Prevents extra space below images */
27+
}
5628

57-
// Function to fetch posts (Example: fetching the first 10 posts)
58-
async function getPosts() {
59-
const postsSnapshot = await db.collection('posts').orderBy('timestamp', 'desc').limit(10).get();
60-
const posts = [];
61-
for (const doc of postsSnapshot.docs) {
62-
const post = doc.data();
63-
post.id = doc.id;
64-
posts.push(post);
29+
/* Optional: Add media queries for smaller screens if you need finer control */
30+
@media (max-width: 768px) {
31+
.gallery {
32+
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); /* Smaller images on smaller screens */
6533
}
66-
return posts;
6734
}
68-
69-
70-
// Example usage
71-
const newPost = {
72-
title: 'My New Post',
73-
authorId: 'user123', // Replace with actual user ID
74-
content: 'This is the full content of my new post.',
75-
summary: 'Short summary of my post.'
76-
};
77-
78-
addPost(newPost);
79-
80-
getPosts().then(posts => console.log('Posts:', posts));
81-
82-
35+
</style>
36+
</head>
37+
<body>
38+
39+
<div class="gallery">
40+
<img src="image1.jpg" alt="Image 1">
41+
<img src="image2.jpg" alt="Image 2">
42+
<img src="image3.jpg" alt="Image 3">
43+
<img src="image4.jpg" alt="Image 4">
44+
<img src="image5.jpg" alt="Image 5">
45+
<img src="image6.jpg" alt="Image 6">
46+
</div>
47+
48+
</body>
49+
</html>
8350
```
8451

85-
**4. Indexing:**
86-
87-
Create an index on the `timestamp` field in the `posts` collection to efficiently order and retrieve posts by date. Firestore automatically creates an index for your top-level fields but it's good practice to explicitly check and make sure that indexes exist for your frequently used queries. Go to your Firestore console and under your database, you will find Indexing option, click it and check if the index is present for timestamp in `posts` collection. If not, add it.
52+
Remember to replace `"image1.jpg"`, `"image2.jpg"`, etc. with the actual paths to your images.
8853

8954

90-
**Explanation:**
55+
## Explanation:
9156

92-
By separating the core post data from detailed information, we reduce the size of the documents in the `posts` collection, making queries significantly faster. Fetching only the essential information first and then fetching detailed information for individual posts as needed optimizes data retrieval. The `orderBy` and `limit` clauses improve query efficiency for retrieving paginated lists of posts.
57+
* **`display: grid;`**: This is the fundamental line that enables CSS Grid layout for the `.gallery` container.
58+
* **`grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));`**: This is the core of the responsiveness. `repeat(auto-fit, ...)` tells the grid to repeat columns as many times as fit within the container. `minmax(250px, 1fr)` defines the minimum column width (250px) and allows columns to expand to fill available space (`1fr`). Adjust `250px` to control the minimum image width.
59+
* **`grid-gap: 20px;`**: Sets the gap between grid items (images).
60+
* **`width: 100%; height: auto;`**: Ensures images fit their grid cells while maintaining aspect ratio.
61+
* **`display: block;`**: Removes extra space that might appear below images.
62+
* **`@media (max-width: 768px)`**: This media query allows for adjustments to the layout at smaller screen widths. In this example, it reduces the minimum image width to 150px.
9363

9464

95-
**External References:**
65+
## Resources to Learn More:
9666

97-
* [Firestore Data Modeling](https://firebase.google.com/docs/firestore/design-overview)
98-
* [Firestore Query Limitations](https://firebase.google.com/docs/firestore/query-data/query-limitations)
99-
* [Firestore Indexing](https://firebase.google.com/docs/firestore/query-data/indexing)
67+
* **MDN Web Docs - CSS Grid Layout:** [https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout)
68+
* **CSS-Tricks - A Complete Guide to Grid:** [https://css-tricks.com/snippets/css/complete-guide-grid/](https://css-tricks.com/snippets/css/complete-guide-grid/)
10069

10170

10271
Copyrights (c) OpenRockets Open-source Network. Free to use, copy, share, edit or publish.

‎errors/css/css-challenge-responsive-image-gallery-with-css-grid/README.md‎

Lines changed: 21 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -1,13 +1,14 @@
1-
# 🐞 CSS Challenge: Responsive Image Gallery with CSS Grid
1+
# 🐞 CSS Challenge: Responsive Image Gallery with CSS Grid
22

33

4-
This challenge focuses on building a responsive image gallery using CSS Grid. The goal is to create a visually appealing layout that adapts seamlessly to different screen sizes, showcasing a set of images effectively. We'll utilize CSS Grid for its power in creating complex layouts easily.
4+
This challenge focuses on creating a responsive image gallery using CSS Grid. The goal is to build a gallery that dynamically adjusts its layout to fit different screen sizes, displaying images in a visually appealing and organized manner. We'll be using plain CSS (CSS3) for this example, although the concepts could easily be adapted to Tailwind CSS.
55

6-
**Description of the Styling:**
6+
## Description of the Styling:
77

8-
The gallery will display images in a grid, with a fixed number of columns on larger screens and collapsing to a single column on smaller screens. We'll add a subtle hover effect to the images, perhaps a slight shadow or opacity change. The overall style will be clean and modern.
8+
The gallery will display images in a grid layout. On larger screens, it will show a certain number of images per row. As the screen size decreases, the number of images per row will automatically adjust to maintain a responsive design. We aim for a clean, modern look with consistent spacing between images. Images will maintain their aspect ratio.
99

10-
**Full Code (HTML & CSS):**
10+
11+
## Full Code:
1112

1213
```html
1314
<!DOCTYPE html>
@@ -17,27 +18,20 @@ The gallery will display images in a grid, with a fixed number of columns on lar
1718
<style>
1819
.gallery {
1920
display: grid;
20-
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Responsive columns */
21-
grid-gap: 20px;
22-
padding: 20px;
21+
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Adjust minmax value for image width */
22+
grid-gap: 20px; /* Adjust gap as needed */
2323
}
2424
2525
.gallery img {
2626
width: 100%;
2727
height: auto;
2828
display: block; /* Prevents extra space below images */
29-
transition: transform 0.3s ease; /* Smooth hover effect */
30-
}
31-
32-
.gallery img:hover {
33-
transform: scale(1.05);
34-
box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
3529
}
3630
37-
/* Mobile-first approach: Single column on smaller screens */
31+
/* Optional: Add media queries for smaller screens if you need finer control */
3832
@media (max-width: 768px) {
3933
.gallery {
40-
grid-template-columns: 1fr; /* Single column */
34+
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); /* Smaller images on smaller screens */
4135
}
4236
}
4337
</style>
@@ -57,22 +51,23 @@ The gallery will display images in a grid, with a fixed number of columns on lar
5751
</html>
5852
```
5953

60-
**Remember to replace `"image1.jpg"`, `"image2.jpg"`, etc. with the actual paths to your images.**
54+
Remember to replace `"image1.jpg"`, `"image2.jpg"`, etc. with the actual paths to your images.
6155

6256

63-
**Explanation:**
57+
## Explanation:
6458

65-
* **`display: grid;`**: This is the core of CSS Grid. It enables grid layout for the `.gallery` container.
66-
* **`grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));`**: This is the magic of responsive grid. `repeat(auto-fit, ...)` allows the grid to automatically adjust the number of columns based on available space. `minmax(250px, 1fr)` ensures each column is at least 250px wide, but will also share available space equally (`1fr`).
67-
* **`grid-gap: 20px;`**: Adds spacing between the grid items (images).
68-
* **`@media (max-width: 768px)`**: This media query targets screens smaller than 768px (tablets and smaller). Inside, we set `grid-template-columns: 1fr;` to create a single-column layout.
69-
* **`transition` and `transform`**: These properties create the smooth hover effect.
59+
* **`display: grid;`**: This is the fundamental line that enables CSS Grid layout for the `.gallery` container.
60+
* **`grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));`**: This is the core of the responsiveness. `repeat(auto-fit, ...)` tells the grid to repeat columns as many times as fit within the container. `minmax(250px, 1fr)` defines the minimum column width (250px) and allows columns to expand to fill available space (`1fr`). Adjust `250px` to control the minimum image width.
61+
* **`grid-gap: 20px;`**: Sets the gap between grid items (images).
62+
* **`width: 100%; height: auto;`**: Ensures images fit their grid cells while maintaining aspect ratio.
63+
* **`display: block;`**: Removes extra space that might appear below images.
64+
* **`@media (max-width: 768px)`**: This media query allows for adjustments to the layout at smaller screen widths. In this example, it reduces the minimum image width to 150px.
7065

7166

72-
**Links to Resources to Learn More:**
67+
## Resources to Learn More:
7368

74-
* **CSS Grid Layout:** [https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout) (MDN Web Docs)
75-
* **CSS Grid Tutorial:** [https://css-tricks.com/snippets/css/complete-guide-grid/](https://css-tricks.com/snippets/css/complete-guide-grid/) (CSS-Tricks)
69+
* **MDN Web Docs - CSS Grid Layout:** [https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout)
70+
* **CSS-Tricks - A Complete Guide to Grid:** [https://css-tricks.com/snippets/css/complete-guide-grid/](https://css-tricks.com/snippets/css/complete-guide-grid/)
7671

7772

7873
Copyrights (c) OpenRockets Open-source Network. Free to use, copy, share, edit or publish.

0 commit comments

Comments
 (0)