# 一.Alert 警告（❤️❤️）
- 组件介绍 Layout 布局 (opens new window) 组件目录
# element-ui
├── packages # 放置element的组件（css样式放置在这个目录下theme-chalk下）
│ ├── alert
│ │ ├── src # alert组件
│ │ │ └── main.vue # 组件注册的入口文件
│ │ └── index.js # 组件注册的入口文件
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# index.js
import Alert from "./src/main"
/* istanbul ignore next */
Alert.install = function(Vue) {
Vue.component(Alert.name, Alert)
}
export default Alert
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在 vue 项目中通过引用这个组件，然后通过 vue.use 加载这个组件，内部会调用 install 方法，将组件加载到 Vue 实例内部
# main.vue
<template>
<transition name="el-alert-fade">
<div
class="el-alert"
:class="[typeClass, center ? 'is-center' : '', 'is-' + effect]"
v-show="visible"
role="alert"
>
<i
class="el-alert__icon"
:class="[iconClass, isBigIcon]"
v-if="showIcon"
></i>
<div class="el-alert__content">
<span
class="el-alert__title"
:class="[isBoldTitle]"
v-if="title || $slots.title"
>
<slot name="title">{{ title }}</slot>
</span>
<p class="el-alert__description" v-if="$slots.default && !description">
<slot></slot>
</p>
<p class="el-alert__description" v-if="description && !$slots.default">
{{ description }}
</p>
<i
class="el-alert__closebtn"
:class="{
'is-customed': closeText !== '',
'el-icon-close': closeText === '',
}"
v-show="closable"
@click="close()"
>{{ closeText }}</i
>
</div>
</div>
</transition>
</template>
<script type="text/babel">
const TYPE_CLASSES_MAP = {
success: "el-icon-success",
warning: "el-icon-warning",
error: "el-icon-error",
}
export default {
name: "ElAlert",
props: {
title: {
type: String,
default: "",
},
description: {
type: String,
default: "",
},
type: {
type: String,
default: "info",
},
closable: {
type: Boolean,
default: true,
},
closeText: {
type: String,
default: "",
},
showIcon: Boolean,
center: Boolean,
effect: {
type: String,
default: "light",
validator: function(value) {
return ["light", "dark"].indexOf(value) !== -1
},
},
},
data() {
return {
visible: true,
}
},
methods: {
close() {
this.visible = false
this.$emit("close")
},
},
computed: {
typeClass() {
return `el-alert--${this.type}`
},
iconClass() {
return TYPE_CLASSES_MAP[this.type] || "el-icon-info"
},
isBigIcon() {
return this.description || this.$slots.default ? "is-big" : ""
},
isBoldTitle() {
return this.description || this.$slots.default ? "is-bold" : ""
},
},
}
</script>
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