Gain insights into designing mobile-responsive web layouts using Flexbox. Delve into Box Model basics, Flexbox containers, and item alignment, and apply your knowledge to create stunning, mobile-first websites.

CBCA - CSS with Flexbox (Intermediate)-01.jpg

In this course, you will get hands-on experience in designing mobile-responsive web layouts using Flexbox. You will start with the basics like the Box Model and the process of layouting.

You will then move on to advanced concepts such as Flexbox containers, and aligning individual Flexbox items. Near the end of the course, you will put everything you just learned into practice. You will work on a project that focuses on developing a mobile-first website where you’ll experiment with page layout, headers, footers, and a lot more.

By the end of this course, you will be able to use Flexbox in your own projects to create beautiful layouts.

Designing Web Layouts with CSS and Flexbox

# Challenges with creating multiline grid structure

When creating a gallery of images or a landing page displaying thumbnails of blog posts, it is a natural phenomenon that we prefer styling each image or post in a container, regardless of whether they are displayed in one line or multiple lines.

The following markup is not intuitive: 

```html
<div class="container">
  <div class="row">
    <div class="blogpost">Post 1</div>
    <div class="blogpost">Post 2</div>    
    <div class="blogpost">Post 3</div>
  </div>
  <div class="row">
    <div class="blogpost">Post 4</div>
    <div class="blogpost">Post 5</div>    
    <div class="blogpost">Post 6</div>
  </div>
</div>
```

The problem with the above markup is that we hardcode the presentation. Using this layout, we have to display all three blogposts in one row. This is not too good when creating responsive layouts. 

Therefore, the need arises to create layouts like this:

```html
<div class="container">
  <div class="blogpost">Post 1</div>
  <div class="blogpost">Post 2</div>    
  <div class="blogpost">Post 3</div>
  <div class="blogpost">Post 4</div>
  <div class="blogpost">Post 5</div>    
  <div class="blogpost">Post 6</div>
</div>
```

Whether these posts are displayed in one column or three-columns, it is a decision we have to take in our CSS files. 

Let's provide some basic styles for our container and our post: 

```css
.container {
  display: flex;
  justify-content: space-evenly;
  width: 800px;
}

.blogpost {
  width: 225px;
  height: 150px;
  box-sizing: border-box;
  border: 1px solid black;
  background-color: lightgrey;
}
```

We will also add a black ruler element to measure how wide `800px` is.

After displaying these elements, we'll see the following result:



# Challenges with creating multiline grid structure

When creating a gallery of images or a landing page displaying thumbnails of blog posts, it is a natural phenomenon that we prefer styling each image or post in a container, regardless of whether they are displayed in one line or multiple lines.

The following markup is not intuitive: 

```html
<div>
  <div>
    <div>Post 1</div>
    <div>Post 2</div>    
    <div>Post 3</div>
  </div>
  <div>
    <div>Post 4</div>
    <div>Post 5</div>    
    <div>Post 6</div>
  </div>
</div>
```

The problem with the above markup is that we hardcode the presentation. Using this layout, we have to display all three blogposts in one row. This is not too good when creating responsive layouts. 

Therefore, the need arises to create layouts like this:

```html
<div>
  <div>Post 1</div>
  <div>Post 2</div>    
  <div>Post 3</div>
  <div>Post 4</div>
  <div>Post 5</div>    
  <div>Post 6</div>
</div>
```

Whether these posts are displayed in one column or three-columns, it is a decision we have to take in our CSS files. 

Let's provide some basic styles for our container and our post: 

```css
.container {
  display: flex;
  justify-content: space-evenly;
  width: 800px;
}

.blogpost {
  width: 225px;
  height: 150px;
  box-sizing: border-box;
  border: 1px solid black;
  background-color: lightgrey;
}
```

We will also add a black ruler element to measure how wide `800px` is.

After displaying these elements, we'll see the following result:



In this lesson, we will create a Flexbox-based grid with multiple rows or columns using flex-wrap. We will learn why wrapping is beneficial when creating a list of blog posts or a list of images.

Getting Started

Using Flexbox Containers

Aligning Individual Flexbox Items

Designing a Mobile-first Website Using Flexbox

Flexbox Conclusion and Next Steps

Flex-wrap

Challenges with creating multiline grid structure