实用的Vue开发技巧

import Vue from "vue";
export const store = Vue.observable({ count: 0 });
export const mutations = {
setCount(count) {
store.count = count;
}
};

<template>
<div id="app">
<img width="25%" src="./assets/logo.png">
<p>count:{{count}}</p>
<button @click="setCount(count+1)">+1</button>
<button @click="setCount(count-1)">-1</button>
</div>
</template>
<script>
import { store, mutations } from "./store";
export default {
name: "App",
computed: {
count() {
return store.count;
}
},
methods: {
setCount: mutations.setCount
}
};
</script>
<style>

export default {
data: () => ({
users: {}
}),
async created() {
const users = await axios.get("/api/users");
this.users = Object.freeze(users);
}
};

export default {
data: () => ({
users: []
}),
async created() {
const users = await axios.get("/api/users");
this.users = Object.freeze(users);
},
methods:{
// 改变值不会触发视图响应
this.users[0] = newValue
// 改变引用依然会触发视图响应
this.users = newArray
}
};

<h1>Hello Vanilla!</h1>
<div>
We use Parcel to bundle this sandbox, you can find more info about Parcel
<a href="https://parceljs.org" rel="external nofollow" target="_blank" rel="noopener noreferrer">here</a>.
</div>
body {
font-family: sans-serif;
}
a {
color: red;
}
ul {
li {
list-style: none;
}
}
import Purgecss from "purgecss";
const purgecss = new Purgecss({
content: ["**/*.html"],
css: ["**/*.css"]
});
const purgecssResult = purgecss.purge();

<span>
<slot>{{ user.lastName }}</slot>
</span>

<current-user>
{{ user.firstName }}
</current-user>

<span>
<slot v-bind:user="user">
{{ user.lastName }}
</slot>
</span>

<current-user>
<template v-slot:default="slotProps">
{{ slotProps.user.firstName }}
</template>
</current-user>

<current-user v-slot="slotProps">
{{ slotProps.user.firstName }}
</current-user>

<!-- SortList -->
<template>
<BaseList v-bind="$props" v-on="$listeners"> <!-- ... --> </BaseList>
</template>
<script>
import BaseList from "./BaseList";
// 包含了基础的属性定义
import BaseListMixin from "./BaseListMixin";
// 封装了排序的逻辑
import sort from "./sort.js";
export default {
props: BaseListMixin.props,
components: {
BaseList
}
};
</script>

<!-- App.vue -->
<template>
<div id="app">
<List
:items="['Wonderwoman', 'Ironman']"
:item-click="item => (clicked = item)"
/>
<p>Clicked hero: {{ clicked }}</p>
</div>
</template>
<script>
import List from "./List";
export default {
name: "App",
data: () => ({ clicked: "" }),
components: { List }
};
</script>
<!-- List.vue 函数式组件 -->
<template functional>
<div>
<p v-for="item in props.items" @click="props.itemClick(item);">
{{ item }}
</p>
</div>
</template>

// Parent.vue
<Child @mounted="doSomething"/>
// Child.vue
mounted() {
this.$emit("mounted");
}

<Child @hook:mounted="doSomething"/>