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

As `flex-direction` and `flex-wrap` often come hand in hand, a useful shorthand lets us specify them in one single rule.

# `flex-direction` and `flex-flow` values 

As a reminder, let's summarize the possible `flex-direction` and `flex-flow` values.

The `flex-direction` property can take four possible values: 

- `row`: this is the default value, you don't need to set it manually. Elements flow from left to right. The main axis is horizontal, the cross axis is vertical.
- `row-reverse`: Elements flow from right to left. The main axis is horizontal, and the cross axis is vertical just like in the case of the `row` value. 
- `column`: Elements flow from top to bottom. The main axis is vertical, and the cross axis is horizontal.
- `column-reverse`: Elements flow from bottom to top. The main axis is vertical and the cross axis is horizontal.

The `flex-wrap` property can take three possible values: 

- `nowrap` is the default value. Using this value, Flexbox does not add a line break and fits everything in one line.
- `wrap` adds a line break once you run out of available space. The line break happens from top to bottom.
- `wrap-reverse` does the same as `wrap` except that the order of lines is reversed along the cross axis. 

# Introducing `flex-flow` 

The `flex-flow` property takes two values:

1. the `flex-direction` property value, 
2. the `flex-wrap` property value.

As we have not seen the `wrap-reverse` value in action yet, we will concentrate on this value in the below examples.

# `flex-flow` example 

We will use the same container as in the previous lesson.

```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 class="blogpost">Post 7</div>
</div>
```

We will not use breakpoints this time. The dimensions of the blog post container shrinks too:

```css 
.container {
  display: flex;
  flex-flow: row wrap-reverse;
  justify-content: flex-start;
  margin: 0 auto;
  width: 100%;
  max-width: 825px;
}

.blogpost {
  box-sizing: border-box;
  border: 1px solid black;
  background-color: lightgrey;
  width: 100%;
  width: 125px;
  height: 75px;
  margin: 15px;
}
```

Notice the `flex-flow: row wrap-reverse;` rule. This rule is equivalent to: 

```css
  flex-direction: row; 
  flex-wrap: wrap-reverse;
```

Obviously, `flex-direction: row;` is optional, because unless we override another value, the default value does not need to be mentioned.

Therefore, we will also add a second variant: 

```css 
  flex-flow: row-reverse wrap-reverse;
```

Let's see the example:


As `flex-direction` and `flex-wrap` often come hand in hand, a useful shorthand lets us specify them in one single rule.

# `flex-direction` and `flex-flow` values 

As a reminder, let's summarize the possible `flex-direction` and `flex-flow` values.

The `flex-direction` property can take four possible values: 

- `row`: this is the default value, you don't need to set it manually. Elements flow from left to right. The main axis is horizontal, the cross axis is vertical.
- `row-reverse`: Elements flow from right to left. The main axis is horizontal, and the cross axis is vertical just like in the case of the `row` value. 
- `column`: Elements flow from top to bottom. The main axis is vertical, and the cross axis is horizontal.
- `column-reverse`: Elements flow from bottom to top. The main axis is vertical and the cross axis is horizontal.

The `flex-wrap` property can take three possible values: 

- `nowrap` is the default value. Using this value, Flexbox does not add a line break and fits everything in one line.
- `wrap` adds a line break once you run out of available space. The line break happens from top to bottom.
- `wrap-reverse` does the same as `wrap` except that the order of lines is reversed along the cross axis. 

# Introducing `flex-flow` 

The `flex-flow` property takes two values:

1. the `flex-direction` property value, 
2. the `flex-wrap` property value.

As we have not seen the `wrap-reverse` value in action yet, we will concentrate on this value in the below examples.

# `flex-flow` example 

We will use the same container as in the previous lesson.

```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>Post 7</div>
</div>
```

We will not use breakpoints this time. The dimensions of the blog post container shrinks too:

```css 
.container {
  display: flex;
  flex-flow: row wrap-reverse;
  justify-content: flex-start;
  margin: 0 auto;
  width: 100%;
  max-width: 825px;
}

.blogpost {
  box-sizing: border-box;
  border: 1px solid black;
  background-color: lightgrey;
  width: 100%;
  width: 125px;
  height: 75px;
  margin: 15px;
}
```

Notice the `flex-flow: row wrap-reverse;` rule. This rule is equivalent to: 

```css
  flex-direction: row; 
  flex-wrap: wrap-reverse;
```

Obviously, `flex-direction: row;` is optional, because unless we override another value, the default value does not need to be mentioned.

Therefore, we will also add a second variant: 

```css 
  flex-flow: row-reverse wrap-reverse;
```

Let's see the example:


The Flex-flow container combines flex-direction and flex-wrap. Learning flex-flow gives us the opportunity to set up your Flexbox containers in a compact way.

Getting Started

Using Flexbox Containers

Aligning Individual Flexbox Items

Designing a Mobile-first Website Using Flexbox

Flexbox Conclusion and Next Steps

Flex-flow: Combining flex-direction and flex-wrap

`flex-direction` and