How to Register a Vue3 Global Component

With the new versions of Vue3 out now, it’s useful to start learning how the new updates will change the way we write code. One example is the changes in the way we write our index.js file (the file that handles creating our Vue app).

Today, we’ll take a look at how to register Vue3 Global Components that can be used across our entire Vue app. It’s a little different from how we declared them in Vue2, but it’s just as simple.

For this tutorial, I am working with the beta release of Vue3 that can be found via the vue-next Github repository.

Alright. Let’s just get straight to it.

What are Vue Global Components?

First off, we have to understand what a Vue3 global component is and why we might want to use one.

Normally, when we want to include a component inside our Vue instance, we register it locally. That normally looks something like this.

<script>
import PopupWindow from '../components/PopupWindow.vue';

export default {
  components: {
    PopupWindow
  }
}
</script>

#web-development #programming #vuejs #technology #javascript #vue3

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How to Register a Vue3 Global Component

With the new versions of Vue3 out now, it’s useful to start learning how the new updates will change the way we write code. One example is the changes in the way we write our index.js file (the file that handles creating our Vue app).

Today, we’ll take a look at how to register Vue3 Global Components that can be used across our entire Vue app. It’s a little different from how we declared them in Vue2, but it’s just as simple.

For this tutorial, I am working with the beta release of Vue3 that can be found via the vue-next Github repository.

Alright. Let’s just get straight to it.

What are Vue Global Components?

First off, we have to understand what a Vue3 global component is and why we might want to use one.

Normally, when we want to include a component inside our Vue instance, we register it locally. That normally looks something like this.

<script>
import PopupWindow from '../components/PopupWindow.vue';

export default {
  components: {
    PopupWindow
  }
}
</script>

#web-development #programming #vuejs #technology #javascript #vue3

Extending Vue.js Components

What’s the best way to “extend” a Vue component, i.e. use one component as the basis for other components?

Doing this could save you from duplicating code, making your components quicker to develop and easier to maintain.

There are a number of APIs and patterns that Vue offers for this, and you’ll need to choose the right one depending both on your goals and personal taste.

In this article, I’ll give you an overview of the different options to help you choose the best and most suitable for your scenario.

Do you really need to extend your component?

Keep in mind that all methods of extending components can add complexity and verbosity to your code, and in some cases, additional performance overhead.

So before you decide to extend a component, it’s a good idea to first check if there are simpler design patterns that can achieve what you want.

The following component design patterns can often be sufficient substitutes for extending a component:

• Props-driven template logic
• Slots
• JavaScript utility functions

Let’s do our due diligence by briefly reviewing these.

Props-driven template logic

The easiest way to make a component multi-use, and thus avoid extending it, is to provide a prop which drives conditional logic in the template.

In the following example, we use a prop type for this purpose.

<template>
  <div class="wrapper">
    <div v-if="type === 'a'">...</div>
    <div v-else-if="type === 'b'">...</div>
    <!--etc etc-->
  </div>
</template>
<script>
export default {
  props: { type: String },
  ...
}
</script>

A parent can then declare this component and use the prop to get the variation required.

<template>
  <MyVersatileComponent type="a" />
  <MyVersatileComponent type="b" />
</template>

Here are two indicators that you’ve either hit the limits of this pattern or are misusing it:

1. The component composition model makes an app scalable by breaking down the state and logic into atomic parts. If you have too many variations in the one component (a “mega component”) you’ll find it won’t be readable or maintainable.
2. Props and template logic are intended to make a component dynamic but come at a runtime resource cost. It’s an anti-pattern if you’re using this mechanism to solve a code composition problem at runtime.

Slots

Another way to make a component versatile without extending it is to allow the parent component to set custom content within the child using slots.

<template>
  <div class="wrapper">
    <h3>Common markup</div>
    <slot />
  </div>
</template>

<template>
  <MyVersatileComponent>
    <h4>Inserting into the slot</h4>
  </MyVersatileComponent>
</template>

Renders as:

<div class="wrapper">
  <h3>Common markup</div>
  <h4>Inserting into the slot</h4>
</div>

A potential limitation of this pattern is that the elements in the slot belong to the parent’s context, which may not be a natural way of dividing your logic and state.

Scoped slots can bring more flexibility, and we’ll explore these more in the section on renderless components.

JavaScript utility functions

If you only need to reuse standalone functions across your components, you can simply extract these into JavaScript modules without any need to use an extending pattern.

JavaScript’s module system is a very flexible and robust way of sharing code, so you should lean on it where possible.

export default function () {
  ...
}

import MyUtilityFunction from "./MyUtilityFunction";
export default {
  methods: {
    MyUtilityFunction
  }
}

#vue.js #components #composition api #renderless components #vue

Django + Vue3 — The Best of Both Frontends

In the previous articles of this series, I’ve demonstrated a method of integrating Django templates and Vue in such a way that preserves the strengths of both frontend frameworks.

Since those articles were published, Vue3 has been released, bringing a variety of improvements and a list of breaking changes. With these numerous changes, the code examples from the prior articles in this series no longer work directly with Vue3. But happily, with only a few isolated changes, the same general approach works well with Vue3 and, moreover, the code becomes, in my opinion, simpler. In fact, we need not alter our components, our Vuex stores, or even our vue.config.js to work with Vue3. Rather, the required changes are limited to the app initialization logic.

Instead of rehashing the ideas and approach described in prior articles of this series, this article will instead enumerate the changes needed to adapt the Vue2 solution to Vue3. At the same time, I’ll introduce a couple of additional changes that, while not strictly necessary for Vue3, improve the overall quality of the Vue + Django integration.

If you’re just starting with Vue + Django, I suggest reading from the start of these articles to learn more about the general approach utilized in this article. Or, to start hacking immediately, check out the sample application source code.

Overview of changes

In Vue2, app initialization was generally done with new Vue() constructor. However, this approach was eliminated in Vue3, so instead we will adapt the code to use the new createApp() method. Similarly, we no longer can instantiate the Vuex store with new Vuex.store() but will instead use createStore().

Both these changes are straightforward adaptations based on the Vue migration guide.

However, our usage with Django necessitates a couple additional changes. First, we must provide for passing of properties from Django template, as our previous approach, which relied on new Vue(), no longer works. Second, as we may potentially be adding several Vue apps to a single page, it behooves us to extract our app/store creation logic into a callable function.

#vuejs #django #django + vue3 — the best of both frontends #both frontend #vue3 #best of both frontends

Firebase Login & Register App With Email | Part - 6 | Register User

Learn how to create a login and register android app using email with the firebase library. In this 6th part, we will register the user with the data validated in the last video.

Playlist: https://www.youtube.com/playlist?list=PLlGT4GXi8_8dm7OeLB5SiVZAPXeSq9i2Z

Need Help?
Join our Facebook Group: fb.com/groups/smallacademy
Source Code: github.com/bikashthapa01

#register user #firebase #login & register app #email

Firebase Login & Register App With Email | Part - 4 | Register Layout Design

Learn how to create a login and register android app using email with the firebase library. In this 4th Part of the series, we will design the required layout for the register activity.

Playlist: https://www.youtube.com/playlist?list=PLlGT4GXi8_8dm7OeLB5SiVZAPXeSq9i2Z

Need Help?
Join our Facebook Group: fb.com/groups/smallacademy
Source Code: github.com/bikashthapa01

#firebase #register app #email #register layout design