Vue.js 3.0 Tutorial
Vue.js 3.0 Component Advanced
Vue.js 3.0 Transitions & Animations
Vue.js 3.0 Reusable & Combinable
Vue.js 3.0 Advanced
Vue.js 3.0 Tools
Vue.js 3.0 Scale
Vue.js 3.0 Accessibility
Vue.js 3.0 Migrating from Vue2
Vue.js 3.0 Contribute Documentation
Vue.js 3.0 API References
Vue.js 3.0 Style Guide
In Vue 3, you still have the option to use the Options API that Vue 2 users are familiar with. The Options API uses an object-based syntax where you have specific properties like data, computed, methods, watch, mounted etc., that you use to define the behavior of your component.
Here's a simple example of how you might use the Options API in a Vue 3 component:
<template>
<div>
<p>{{ computedMessage }}</p>
<button @click="increment">Increment</button>
</div>
</template>
<script>
export default {
data() {
return {
count: 0
}
},
computed: {
computedMessage() {
return `The count is ${this.count}`;
}
},
methods: {
increment() {
this.count++;
}
},
mounted() {
console.log('Component is mounted!');
}
}
</script>
In this component:
data: is a function that returns an object where we define all the data properties we want to track in our component. Here we have one data property, count, which we initialize to 0.
computed: is an object where we define computed properties. These are properties that are derived from our data properties. In our component, we define a computed property computedMessage which returns a string that includes the current count.
methods: is an object where we define methods. These are functions that we can use in our component. In this case, we define a method increment that increases the count by one.
mounted: is a lifecycle hook that is called after the component is mounted to the DOM. Here we simply log a message to the console.
This is a very basic example, but Vue's Options API allows you to build quite complex components with lots of interactivity.
In Vue 3, there's also the new Composition API which allows you to use a more function-based approach to building your components. This new API can make your components more readable and maintainable, especially as they grow in complexity. You can use both APIs in your Vue 3 applications, so you can choose the one that fits best for each component or situation.
Combining Vue 3.0 Component Options:
<script>
export default {
data() {
return {
message: 'Hello Vue 3.0!',
};
},
methods: {
greet() {
console.log(this.message);
},
},
};
</script>
Vue 3.0 Composition API and Options:
<script>
import { ref, computed } from 'vue';
export default {
setup() {
const message = ref('Hello Vue 3.0!');
const greet = () => {
console.log(message.value);
};
return { message, greet };
},
};
</script>
Merging Options in Vue 3.0 Mixins:
<script>
const myMixin = {
data() {
return {
mixinData: 'Mixin Data',
};
},
created() {
console.log('Mixin Created Hook');
},
};
export default {
mixins: [myMixin],
data() {
return {
componentData: 'Component Data',
};
},
created() {
console.log('Component Created Hook');
},
};
</script>
Vue 3.0 Extending Component Options:
<script>
import BaseComponent from './BaseComponent.vue';
export default {
extends: BaseComponent,
data() {
return {
additionalData: 'Additional Data',
};
},
};
</script>
Custom Options in Vue 3.0:
<script>
export default {
customOption: 'Custom Value',
created() {
console.log(this.$options.customOption);
},
};
</script>
Combining Lifecycle Hooks in Vue 3.0:
<script>
export default {
beforeCreate() {
console.log('Before Create Hook');
},
created() {
console.log('Created Hook');
},
beforeMount() {
console.log('Before Mount Hook');
},
mounted() {
console.log('Mounted Hook');
},
};
</script>
Vue 3.0 Global and Local Options:
<script>
Vue.customGlobalOption = 'Global Value';
export default {
data() {
return {
localOption: 'Local Value',
};
},
created() {
console.log(this.$options.customGlobalOption); // Accessing global option
console.log(this.localOption); // Accessing local option
},
};
</script>
Advanced Options Combinations in Vue 3.0:
<script>
export default {
data() {
return {
message: 'Hello Vue 3.0!',
};
},
computed: {
reversedMessage() {
return this.message.split('').reverse().join('');
},
},
methods: {
greet() {
console.log(this.message);
},
},
};
</script>
Composition API and Traditional Options in Vue 3.0:
<script>
import { ref } from 'vue';
export default {
data() {
return {
traditionalData: 'Traditional Data',
};
},
setup() {
const compositionData = ref('Composition Data');
return { compositionData };
},
};
</script>
Vue 3.0 Dynamic Component Options:
<script>
export default {
props: {
dynamicOption: {
type: String,
required: true,
},
},
created() {
console.log(this.dynamicOption);
},
};
</script>
Combining Props, Data, and Methods in Vue 3.0:
<script>
export default {
props: {
message: {
type: String,
default: 'Default Message',
},
},
data() {
return {
internalData: 'Internal Data',
};
},
methods: {
showMessage() {
console.log(this.message);
},
},
};
</script>
Vue 3.0 Options Inheritance:
<script>
const myMixin = {
data() {
return {
mixinData: 'Mixin Data',
};
},
};
export default {
mixins: [myMixin],
data() {
return {
componentData: 'Component Data',
};
},
created() {
console.log(this.mixinData); // Accessing mixin data
},
};
</script>
Vue 3.0 Custom Directives and Options:
<script>
export default {
directives: {
customDirective(el, binding) {
// Custom directive logic
},
},
};
</script>
Vue 3.0 Options Validation:
<script>
export default {
props: {
count: {
type: Number,
required: true,
validator: (value) => value >= 0,
},
},
};
</script>