大家好今天将开始新的系列`基于vue3实现自己的组件库`,本文默认你会安装和创建vue3项目，如果不会请参考[vue官网](https://v3.cn.vuejs.org/guide/installation.html),废话不多说开始实现本章的目标`Message`组件；

### 创建组件库工程目录

- `vair是组件库的名字(名字大家随意)`

![image.png](https://img-blog.csdnimg.cn/img_convert/efa342cc12816d137389ab8e8ef8ec95.png)

### 安装项目依赖

```
npm install less -D
npm install less-loader -D
```

### template

```
<template>
    <div class='v-message'>
        <div v-for='(config, index) in messageList' :key='config.id' 
        :ref= 'el => { if (el) contentList[index] = el}'
        :class='["message-item", config.customClass, config.type, { center: config.center }]'>
            <i :class='[config.iconClass, "icon"]'></i>
            <p class='content'>{{ config.message }}</p>
            <i class='close iconfont icon-guanbi1' @click='close(config)' v-if='config.showClose'></i>
        </div>
    </div>
</template>
```

### script

```
import { ref， defineComponent } from 'vue';

export default defineComponent({
    name: 'message',
    setup () {
        // 消息列表
        const messageList = ref([]);
        // ref列表
        const contentList = ref([]);

const message = (options) => {
            computedConfig(options);
        }

const success = (options) => {
            computedConfig(options, 'success');
        }

const warning = (options) => {
            computedConfig(options, 'warning');
        }

const error = (options) => {
            computedConfig(options, 'error');
        }

const computedIconClass = (type) => {
            switch (type) {
                case 'prompt':
                    return 'iconfont icon-tishi';
                case 'success':
                    return 'iconfont icon-success';
                case 'warning':
                    return 'iconfont icon-jinggao--';
                case 'error':
                    return 'iconfont icon-cuowu';
            }
        };

return {
            messageList,
            contentList,
            close,
            message,
            success,
            warning,
            error
        }
    }
});
```

### css

```
<style lang='less' scoped>
@import url('../../assets/css/animation.css');
.v-message {
    position: fixed;
    z-index: 99999;
    top: 50px;
    left: 0;
    right: 0;
    margin: auto;
    width: 380px;
    .message-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 14px;
        box-sizing: border-box;
        border-radius: 6px;
        padding: 14px;
        overflow: hidden;
        border: 1px solid transparent;
        animation: messageShow .5s;
        animation-fill-mode: forwards;
        .content {
            font-size: 12px;
            line-height: 20px;
            flex: 1;
        }
        .close {
            cursor: pointer;
            &:hover {
                color: #6b6b6b;
            }
        }
        i {
            font-size: 18px;
        }
        .icon {
            margin-right: 14px;
        }
    }
    .center {
        justify-content: center;
        .content {
            flex: 0 1 auto;
        }
    }
    .messageHide {
        animation: messageHide .2s linear;
        animation-fill-mode: forwards;
    }
    .prompt {
        border: 1px solid #ebeef5;
        background-color: #edf2fc;
        .content, i {
            color: #909399;
        }
    }
    .success {
        background-color: #f0f9eb;
        border-color: #e1f3d8;
        .content, i {
            color: #67C23A;
        }
    }
    .warning {
        background-color: #fdf6ec;
        border-color: #faecd8;
        .content, i {
            color: #E6A23C;
        }
    }
    .error {
        background-color: #fef0f0;
        border-color: #fde2e2;
        .content, i {
            color: #F56C6C;
        }
    }
}
</style>
```

### animation.css

- `这个文件的功能就是定义组件所需的动画`

```
@keyframes messageShow {
    0% {
        transform: translateY(-50px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes messageHide {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-50px);
        opacity: 0;
    }
}
```

### 编写message.js

```
import Message from "./Message.vue";
import { createApp } from "vue";

const createMessage = function () {
    const div = document.createElement("div");
    div.id = "v-message";
    document.body.appendChild(div);
    return createApp(Message).mount("#v-message");
};

export default createMessage();
```

### 编写vair出口 index.js

- `后续这个文件会引入很多组件`

```
// Message 消息提示
import Message from './components/Message/message.js';

const Vair = function(Vue) {
    // Message 消息提示
    Vue.config.globalProperties.$message = Message;
}

export default Vair;
```

### 使用组件库

- `在main.js中引入`

```
import { createApp } from 'vue';
import App from './App.vue';
import Vair from './libs/vair/index.js';

const app = createApp(App);
app.use(Vair).mount('#app');
```

### App.vue中调用

```
<template>
    <div class='message'>
        <p class='button' @click='addMsg("success")'>成功</p>
        <p class='button' @click='addMsg("warning")'>警告</p>
        <p class='button' @click='addMsg("error")'>错误</p>
        <p class='button' @click='addMsg("close")'>可关闭</p>
        <p class='button' @click='addMsg("center")'>文字居中</p>
    </div>
</template>

const addMsg = (type) => {
            if (type === 'success') {
                app.ctx.$message.success({
                    message: '这是一条成功消息'
                });
            }
            
            if (type === 'warning') {
                app.ctx.$message.warning({
                    message: '这是一条警告消息'
                });
            }

if (type === 'error') {
                app.ctx.$message.error({
                    message: '这是一条错误消息'
                });
            }

if (type === 'close') {
                app.ctx.$message.success({
                    message: '这是一条可关闭的消息',
                    showClose: true,
                    onClose: (config) => {
                        console.log(config)
                    },
                });
            }

if (type === 'center') {
                app.ctx.$message.success({
                    message: '这是一条居中的消息',
                    center: true
                });
            }
        };

return {
            addMsg
        }
    }
})
</script>

### 效果展示

![image.png](https://img-blog.csdnimg.cn/img_convert/bf956112b1f5e65b690fa1f6851c76d4.png)
![在这里插入图片描述](https://img-blog.csdnimg.cn/8c1d2cfd240e4595b7e16e5c7b4652ab.jpeg#pic_center)

ITPub博客

web技术分享| 基于vue3实现自己的组件库，第一章：Message组件

最新文章