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Collapse and Accordion

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Front-End Web UI Frameworks and Tools: Bootstrap 4

Universidad Científica y Tecnológica de Hong Kong

4.8 (1,675 calificaciones) | 40K estudiantes inscritos

Curso 1 de 4 en Full-Stack Web Development with React Programa Especializado

This course will give you an overview of client-side web UI frameworks, in particular Bootstrap 4. You will learn about grids and responsive design, Bootstrap CSS and JavaScript components. You will learn about CSS preprocessors, Less and Sass. You will also learn the basics of Node.js and NPM and task runners like Grunt and Gulp. At the end of this course, you will be able to a)Set up, design and style a web page using Bootstrap 4 and its components, b) Create a responsive web page design, and c) Make use of web tools to setup and manage web sites. This course also includes an honors track that enables you to work on your own project developing a website using Bootstrap 4. Students enrolling in this course should have prior good working knowledge of HTML, CSS and JavaScript.

Destrezas que aprenderás

Bootstrap (Front-End Framework), Node.Js, Jquery, SASS (Stylesheet Language)

Revisiones

4.8 (1,675 calificaciones)

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AA

Jul 12, 2018

One of the best courses I have ever taken. Everything is explained in the best way possible. The Instructor is also good. Must give this course a try. It enhanced my knowledge of the subject matter.

BB

Nov 07, 2018

The instructor knows his subject well. He uses real world examples that allow you to achieve something tangible. On a personal note I loved listening to his instruction. He is an enjoyable teacher.

De la lección

Bootstrap Javascript Components

This module concentrates on Bootstrap's JavaScript based components. You will learn about tabs, pills and tabbed navigation, collapse, accordion, scrollspy, affix, tooltips, popovers, modals and the carousel. At the end of this module you need to complete the third assignment.

Collapse and Accordion5:13

Exercise (Video): Accordion8:47

Impartido por:

Jogesh K. Muppala
Associate Professor

[MUSIC]

Let's now talk about a very useful plugin in Bootstrap called as the Collapse.

We have seen its application in the navigation bar earlier.

We'll revisit that code and take a quick look at it in more detail.

A related component is called as the Accordion.

The Accordion makes use of the Collapse plugin for its functioning.

And we will see that in detail in the exercise that follows.

The Collapse plugin provides an easy way of revealing and

hiding content on your web page.

This revealing and hiding of the content is usually triggered

by the user clicking on a button or a link in your web page.

Now you will see many places where the Collapse kind of

behavior is very well leveraged to show content.

We'll revisit our navbar to look at the Collapse plugin in action, and

then we'll also see an Accordion example next.

Going back to our web page, you'll recall that when we created the navbar

in our web page for extra-small screens, the navbar was collapsed and

then it was revealed when we clicked on the button here.

Now this is an example of the use of the Collapse plugin here.

When we look at the code, we will see that we actually apply the Collapse plugin to

the div that contains this navigation bar.

Taking a look at the code for

our navigation bar that we designed earlier, you saw that in here,

inside the container, we created this button which is displayed for

the extra-small screen sizes by using the navbar-toggler class.

Look at the div that follows this button here.

For the div that follows this button, we used the collapse class.

So this is the use of the Collapse plugin in our navbar.

So what this creates is that this particular content,

our navbar that is enclosed inside this div, will be collapsed for

the extra-small screen sizes.

And then together with the Collapse plugin, this button that appears

there will trigger the showing and hiding of this navbar here.

That is why when you look at the button, you will see that right there,

we supply the data-toggle attribute with the collapse in here,

and then the data-target as #Navbar here.

And notice that the id for this div that we applied here is Navbar.

So we are specifying essentially that this button is going to act as the triggering

mechanism for this Collapse plugin to work on this div here.

So this is a use of the Collapse plugin in your web page.

Also, we'll look at the other component, which is the Accordion in Bootstrap.

How does an Accordion behave?

So this is an example of an Accordion that we're going to construct in the exercise

that follows.

So here, you'll see that I have replaced the tabbed navigation that we

did in the previous exercise by using an Accordion here.

The way the Accordion works is that one piece of content is revealed and

the remaining three are hidden.

So this uses the Collapse plugin for this purpose.

So when you click on any one of these other corporate leader's name,

then the details of that corporate leader gets revealed and

the remaining three gets hidden.

So this is the Accordion behavior here.

If you are familiar with an accordion,

the musical instrument, you know how the bellows of the accordion work.

So this is, in some sense, behaving like the bellows of the accordion.

So that's the reason why this component is referred to as an Accordion in Bootstrap.

One more example of the Collapse plugin in use is on your own course website.

So if you go to your course website, and

then you go into the content of your course website and

start viewing the content here, you will notice that on the left side,

you have a navigation that comes into picture on the left side.

So this is the navigation there.

So when you click on each one of them, you notice how the content in here

is hidden and revealed by clicking on each of these links there.

So this is like the Collapse plugin that we saw in Bootstrap.

Although, of course, the Coursera page actually doesn't use Bootstrap.

We'll move to the next exercise where we will see how we construct

the Accordion for showing our corporate leadership information.

[MUSIC]

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