Vue.js' component architecture makes building a user interface efficient and convenient. It allows you to break down your application into smaller, reusable components and then build more complex structures with these components.
This guide will provide you with an advanced introduction to Vue components. We will explore how to create components, how to pass data between components (via props and event buses), and how to render additional content within components using Vue's <slot></slot> element. Each example will come with a runnable CodePen demo.
Key Points
- Vue's componentized architecture helps break down the UI into reusable, easy-to-manage snippets, thereby enhancing the reusability and organization of the code.
- Components can be created globally using
Vue.componentor locally in single-file components. For complex projects, the latter is more suitable for use because of its encapsulation of templates, scripts, and styles. - The data can be passed to subcomponents using props, providing a clear and structured way to manage and pass data in the component tree.
- The event bus can be used to effectively manage communication from child components to parent components, allowing child components to send data back to the component hierarchy.
- Vue's
<slot></slot>element helps nest content within the component, making it more flexible and able to receive content from the parent component, which can be overwritten with fallback content.
How to create components in Vue
Components are essentially reusable Vue instances with names. There are many ways to create components in a Vue application. For example, in small to medium-sized projects, you can register global components using the Vue.component method as follows:
Vue.component('my-counter', {
data() {
return {
count: 0
}
},
template: `<div>{{ count }}</div>`
})
new Vue({ el: '#app' })
The name of the component is my-counter. It can be used like this:
<div> <my-counter></my-counter> </div>When naming a component, you can choose to use kebab-case (
) or Pascal-case (my-custom-component). When referencing components in templates, either variant can be used, but when referencing components directly in the DOM (as shown in the above example), only the MyCustomComponent kebab-case tag name is valid.
You may also notice that in the above example,
data There are several ways to define component templates. Above we used template literals, but we can also use markers with
text/x-template
In more complex projects, global components can quickly become difficult to manage. In this case, it makes sense to design your application to use a single file component. As the name implies, these are single files with
Transfer data to components via Props
Communication from child component to parent component via event bus AI-powered app for creating realistic nude photos Online AI tool for removing clothes from photos. Undress images for free AI clothes remover Swap faces in any video effortlessly with our completely free AI face swap tool! The most popular open source editor Integrate Eclipse with SAP NetWeaver application server. The latest (2018.2.1) professional PHP integrated development tool Chinese version, very easy to use SublimeText3 Linux latest version.vue extensions that contain <template></template>, Vue.component('my-counter', {
data() {
return {
count: 0
}
},
template: `<div>{{ count }}</div>`
})
new Vue({ el: '#app' })
Vue.component() In this guide, I will use the <div>
<my-counter></my-counter>
</div>
<template>
<div>{{ count }}</div>
</template>
<🎜>
author-detailIn the above example component, we define the author details and post information. Next, we have to create the child components. Let's name the child component <blogpost>
<authordetails></authordetails>
<postdetails></postdetails>
<comments></comments>
</blogpost>
ownerWe pass the author object to the child component as props named owner. There is a need to pay attention to the difference here. In a child component, author is the props name that we receive data from the parent component. The data we want to receive is called author-detailTo access this data, we need to declare props in the new Vue({
el: '#app',
data() {
return {
author: {
name: 'John Doe',
email: 'jdoe@example.com'
}
}
}
})
<div>
<author-detail :owner="author"></author-detail>
</div>
Vue.component('author-detail', {
template: `
<div>
<h2 id="owner-name">{{ owner.name }}</h2>
<p>{{ owner.email }}</p>
</div>
`,
props: ['owner']
})
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