In this course, you will learn how to build reactive web applications at any scale with Vue. You will learn the theory that you need to know about Vue.js, and we will be building several example applications as we go along, demonstrating the explained concepts in practice. The course lectures include examples when going through new material, followed by exercises that you can optionally choose to solve - and we walk through the solutions together.
Despite the fact that Vue JS is easy to learn, it is an incredibly powerful framework that can be used to build large web applications as well as small ones. Unlike many other frameworks, Vue.js does not try to take control of your application, and allows you to let the framework control only parts of your application - something that is perfect for migrating legacy applications to a more modern framework without doing a complete rewrite at once! Apart from learning how to build single page applications (SPAs), you will also learn how to manage state in large applications with Vuex.
This course starts from scratch with teaching you how to build a "Hello World!" application in Vue.js and moves towards building advanced applications step by step. By the end of this course, you will be able to build complex and large web applications with Vue.
Let's see just how easy it is to create our first Vue.js application with the classic "Hello World!" application as an example.
Before diving deeper into Vue.js, let's see what the framework is actually all about and why it has become so popular.
In the beginning of the course, we will be using JSFiddle for going through small examples. This lecture shows you how to set Vue.js up in any text editor or IDE in case you prefer that approach instead.
Almost ready to get our hands dirty with Vue.js. First, let's just briefly talk about the format of this section of the course.
The first thing you should know is how to output data, and for this, we will be using something called "string interpolation." This is how we can output data properties from within Vue.js templates.
There are a few gotchas when working with ES6 arrow function in Vue.js. This lecture tells you what to watch out for when coding in Vue.js.
This lecture introduces the concept of Vue.js directives by showing you the v-bind directive.
It's time to take what we have learned so far and put it into practice by completing a few exercises together.
It is also possible to use expressions within directives, and this lecture shows you how to do it.
It's time to learn how to make Vue.js applications respond to user input by using the v-on directive. This lecture shows an example that uses the click event on a button.
We have already seen how to implement event listeners. This lecture shows how to pass arguments to event listeners.
This lecture introduces event modifiers, which can be used to prevent default browser actions or stop event propagation, for example.
Having learned what event modifiers are, it's time to talk a bit about key modifiers. Key modifiers can be used to respond to events only when one or more specific keys are pressed on the keyboard.
Next up is something called modifier keys. Modifier keys refer to the ctrl, alt, shift and Command/Windows keys, and this lecture shows how to use these in combination with key modifiers.
Having seen examples of how to respond to events and how to use modifiers, it's time for you to use this knowledge for writing a bit of code on your own! Afterwards, we will be walking through the solutions together step by step.
This lecture introduces the v-model directive which implements something called two-way data binding. This term refers to how data properties can be updated automatically in response to user input, and how data automatically flows in the other direction, too.
Outputting raw HTML would be dangerous and leave users at risk. Vue.js therefore automatically escapes the data it outputs for you, but let's see how it does this and how to output HTML that should be rendered by browsers with the v-html directive.
Sometimes you may want to only render a given HTML element once, perhaps for performance reasons. You will see how to accomplish this with the v-once directive.
Now it's time to embed a bit of boolean logic into our templates, by using the v-if, v-else-if and v-else directives, allowing us to conditionally add elements to the DOM.
Similar to the v-if directive, one can show or hide HTML elements with the v-show directive. This lecture shows you how to do that and what happens within the DOM when doing so.
By default, the string interpolation syntax is displayed when loading a page, until Vue.js is ready. This lecture looks at how the v-cloak directive can be used to prevent this by hiding elements until Vue is ready.
This lecture dives into how we can loop through arrays within Vue.js templates and shows how to output an array of strings as well as an array of objects on the page.
Sometimes we may need to access a loop's index when using the v-for directive. This lecture shows how to slightly modify the v-for syntax to gain access to this index.
Let's see how we can loop through a given object's properties with the v-for directive. We will see how to access both the property names and values.
This lecture shows how to loop through a number range (e.g. from 1 to 10) with the v-for directive.
When using the v-for directive, there is something to watch out for. We will dive into how Vue.js updates the DOM when changing the values that a v-for directive operates upon, by showing how it can cause problems as well as how to solve it.
We also need to be aware of how Vue.js detects changes that are applied to arrays and how changes are not registered when using the square bracket syntax. We will see how to solve this with the Vue.set method.
Having learned two-way data binding, conditionals and loops, it's time to practice this theory with some exercises. We will go through the solutions to the exercises together afterwards.
This lecture introduces computed properties that can be used when data properties depend on each other. We will see how to implement computed properties, as well as when to use them.
Having seen how to implement computed properties, we will now take a look at how we can add getter and setter methods to these computed properties in order to be able to implement more complex computed properties.
While Vue.js automatically detects changes made to values, one can also implement custom watchers to run arbitrary code whenever a given data property's value changes. We will see how to implement simple search functionality by using a watcher.
Now that we have learned about computed properties and watchers, let's put this theory to work by solving some exercises and going through their solutions afterwards.
Filters in Vue are used to apply text transformation when outputting data. In this lecture, we look at a few examples on how to do just that.
It's time to practice what we just learned about filters in Vue.js.
We typically want to apply some CSS to our page. This lecture shows you how to use the v-bind directive to apply styles to HTML elements with the style attribute.
Similar to how we can apply inline styles to HTML elements, we can also use the v-bind directive to apply classes to the class attribute, which this lecture covers through several examples.
Time to practice what we learned about applying styles to HTML elements in the last two lectures. After you have hopefully tried to solve the exercises yourself, we will go through the solutions together afterwards.
Now that we have used the v-bind and v-on directives quite extensively so far, it's time to see the shorthand versions of these directives, which can save you a bit of time.
Before we begin coding, let's first see the application that we are going to build.
The source code code for the example application that we will build in this section, is available within a GitHub repository.
The first thing we will do, is to use the v-for directive to display the products. We will also implement a filter for displaying currencies properly.
Now that we have displayed the products, it's time to implement so that we can add them to the shopping cart.
Let's add a summary of the number of items in the cart as well as the total price, to the top of the page. To do this, we will use a computed property for calculating the total price for all of the products that are in the cart.
Before displaying the products in the cart, we need a way of switching between the two views or "pages."
In this lecture, we will display the products that are in the cart, as well as apply taxes to the price. We will do this by introducing another computed property.
If we have already added a given product to the cart, it would be nice to increase its quantity instead of adding it to the cart once again. We'll do exactly that in this lecture.
Within the cart, we want to be able to increase and decrease the quantity of each product that has been added, and we'll do that in this lecture.
As the last feature of our application, we will add the checkout function.
This lecture summarizes what we just accomplished with our example application and which Vue techniques we used to build the application.
This section of the course includes some theory that is great to know, although not strictly required for using Vue. Nevertheless, it is highly recommended to complete the section, but you could also skip it for now and come back to it later, if you prefer to jump straight to coding.
We have created quite a few Vue instances by now, but we haven't taken a look at how we can interact with a Vue instance once it has been initialized (except for with events). This is what we will cover in this lecture.
All of our examples so far have only included one Vue instance. In this lecture you will see how multiple Vue instances can be used on the same page.
We have made use of how Vue proxies data so far, but we haven't taken a closer look at how it actually works. This lecture dives into this and talks about proxy methods and more.
Having looked at how Vue proxies data, methods and more, let's take a closer look at how Vue.js keeps track of which changes are made to data and how Vue reacts to them.
Although it visually looks like it, the DOM is not updated synchronously whenever data changes. This lecture explains how Vue updates data by using a queue and something called an event loop.
We have previously seen how to add watchers to a Vue instance, but they can also be added to Vue instance dynamically. This approach provides some additional flexibility, which this lecture shows examples of.
Sometimes you may need to access the DOM. VueJS provides an elegant way of doing this by using a property on the Vue instance in combination with an HTML attribute.
Until now, we have always used an "el" property on the Vue instance to mount it to a template. Alternatively, one can mount the Vue instance dynamically by using the $mount method.
Instead of using the "el" property, one can actually add an inline template to a Vue instance, which you will see in this lecture.
Although typically not necessary, it is possible to destroy a Vue instance manually. This short lecture shows how.
We have used Vue instances until now, but what actually happens behind the scenes? This lecture walks through the lifecycle of Vue instances and discusses the various phases and lifecycle hooks that are available to us as developers.
Now that we know what a Vue instance's lifecycle looks like, it's time for some examples on how to run custom code at various phases of the Vue instance lifecycle. This can be done by using lifecycle hooks, which this lecture is all about.
In this section, we will be setting up a development environment with Vue CLI, webpack, and a development server.
This lecture shows how to install the Vue developer tools for the Chrome browser.
What is the Vue CLI? And what are the differences between the templates that can be chosen for setting up a project? Get the answer to those questions in this lecture.
Using the knowledge from the previous lecture, we will set up a project by using the Vue CLI and the webpack-simple template.
Now that we have set up a project, it's time to take a closer look at the structure of it, i.e. which files were created for us and what they contain.
This lecture takes a closer look at single file components, which we will be working with extensively through the remainder of the course.
Let's introduce Vue components and create our very first component in Vue.js.
Contrary to Vue instances, the "data" property must be a function when working with components. This lecture shows you why this is the case.
Components can be either global or local. See the difference and how to register a component as local or global.
When adding and using components, one can choose between using camelCase, kebab-case or PascalCase. This lecture shows how.
Now that we have learned the very basics of components, it's time to create one within a project created with Vue CLI.
It's time to practice what you learned on global, local and child components - this time within a development environment.
Just a few words on how to organize components.
Styles can be either global or scoped in the context of components. Learn the difference and the quirks of each approach.
Learn how to pass data from one component to another.
Learn how to specify the type of the data that is passed to a component. Also learn how to specify whether or not a data property is required, and how to specify a default value.
We have seen how to work with DOM events, but now it's time to learn how to work with events in the context of components. These events can be used to communicate between components, as you will see.
Apart from using events to communicate between components, this can also be done by using a so-called event bus. Learn how in this lecture.
Time to practice communicating between components.
Learn how to pass markup to components with slots.
Learn how to pass more than a single piece of markup to components with named slots.
Learn how to render components dynamically in scenarios where you don't know which component should be rendered at the time of writing the code.
Instead of destroying and creating components every time a dynamic component changes, they can be kept alive, which also optimizes performance. Learn how in this lecture.
With dynamic components, there are two additional lifecycle hooks; the "activated" hook and the "deactivated" hook. Learn how to use these as well as when they are invoked.
We previously installed the Vue developer extension for Google Chrome. Now that we have a few components, let's take a closer look at its capabilities and how it is useful.
Before starting to implement the application, let's see what it is that we are going to build.
Find the full source code within a GitHub repository.
In this lecture, we prepare most of the components that we are going to need for the application.
In this lecture, we prepare the sidebar's markup so that we are ready to implement switching between the application's different views.
Time to implement so that we can switch between the application's various views.
We need some data to work with when building the application, so we will import some messages from a file.
It would be nice to display the number of messages for each view within the sidebar, so that's what we will do in this lecture.
Having prepared most of the application until now, let's move on to implementing the first view; the inbox.
Within the inbox, it should be possible to mark messages as important, and also to undo this. That's what this lecture is all about.
We implemented the inbox earlier, so now it's time to implement a couple of other views; sent messages, important messages, and trashed messages.
It should be possible to view a single message when clicking it, so we will implement that now.
When opening a message, it would be convenient if the message was automatically marked as read, so let's implement that.
Of course this application is not a one way street, so we need a way to navigate back to where we came from when viewing messages. Let's add a button that does that.
Every mail application with respect for itself provides a way to delete unwanted messages. This one is not exception.
While messages are automatically marked as read when viewing them, it should also be possible to do this manually, and also to mark them as unread.
In this lecture, we will add a button to the inbox view which simulates refreshing the inbox.
This lecture goes through implementing a way to simulate sending a new message.
This lecture briefly summarizes what we implemented and which aspects of the previous sections that we applied in practice when doing so.
This lecture briefly introduces the concept of mixins, being a way to merge options into a Vue instance (and thereby component).
See how to implement a mixin and how the options are merged into a component.
This lecture discusses how mixins are merged into Vue instances and components.
It's also possible to add global mixins, and this lecture shows how to do it.
Earlier in the course, you saw how to implement filter. This lecture takes that one step further and shows how to implement a global filter. This is something that is useful when working with multi-page applications.
You can find the full source code for this section within a GitHub repository.
This lecture is a brief recap of what was covered earlier in the course; using the v-model directive together with text inputs and textareas.
This lecture shows how to work with checkboxes.
This lecture shows how to work with radio buttons.
This lecture shows how to work with select elements, also commonly referred to as dropdowns.
Time to recap on a previous subject, being modifiers.
We used the v-model directive throughout this course, but how does it actually work? Let's take a look in this lecture.
In some cases, we might want to populate form elements with default values based on existing data. You will learn how in this lecture.
Again something that we have already covered, but that is good to talk about in the context of forms; submitting forms.
Before getting started with looking at how to use transitions and animations, let's first introduce what the difference is between the two.
This lecture introduces how to transition single elements.
Transitions can be implemented by using CSS classes. This lecture introduces how this works.
Time to implement our first transition by using CSS classes.
Apart from using default class names, one can also specify the name of a transition to change the default names.
We just saw how to change the names of transitions, and likewise it is also possible to change the class names.
Time to implement a custom animation by using CSS.
Transitions and animations are two different things, although related. They can be mixed and used simultaneously, something that this lecture explains.
See how to transition between elements, i.e. an element that is replaced by another element.
We can also control the transition mode and control the order in which transitions occur (in relation to when elements are added and removed).
Perhaps we want to apply an animation or transition when loading the page initially, something this lecture looks at.
This lecture shows how to apply transitions to dynamic components.
So far, we've seen how to transition single elements. This lecture shows how to transition multiple elements, which is not all that different.
My name is Bo Andersen and I am a software developer from Denmark.
I am a software developer who has previously worked at a successful company, which operates one of the largest websites in Denmark, before deciding to teach full time. I have worked with programming for a decade and have a bachelor's degree in computer science. I started out learning to code by building websites in PHP, but have since worked with many other technologies such as Java, Elasticsearch (ELK), Python, Docker, AWS, etc.
I have also been blogging about programming subjects for a few years, so I encourage you to have a look at my website if you are curious.