标签:列表项 handle font -o 直接 com 序列 工程 pac
vue init webpack-simple demo
添加src/mixins/emitter.js文件(见前几篇博文)
安装font-awesome字体库:
cnpm install font-awesome --save
配置webpack.config.js,引入字体文件:
{ test: /\.(otf|eot|ttf|woff|woff2)$/, loader: ‘file-loader‘ }
在src/main.js中引入font-awesome:
import ‘../node_modules/font-awesome/css/font-awesome.min.css‘
新建src/components/mySelect.vue和myOption.vue文件
先来考虑一下使用场景,一般的下拉菜单都是由无序列表组成,而选项则是一个个列表项:
但是直接slot标签很可能会出现重名,所以需要分别prop一个label和value,其中value是必须的,如果没有slot标签则显示label,所以myOption的基本结构为:
<template> <li class="my-option"> <span v-if="!$slots.default">{{ label }}</span> <slot></slot> </li> </template> <script> import emitter from "../mixins/emitter"; export default { name: "myOption", mixins: [emitter], props: { label: { type: String, default: "empty-label" }, value: { type: String, required: true } } }; </script>
然后来考虑一下myOption可能会存在的状态,选项有选择和取消两种事件,对应的状态就是是否已经被选择,而且选择的状态需要高亮显示:
先来加一个状态:
data() { return { selected: true } }
然后在最外层的li添加一个selected类名和一个右浮的check图标(可以用v-show="selected"来控制显示,我这里用css与文字颜色一起控制):
<template> <li :class="[‘my-option‘, { selected: selected }]"> <span v-if="!$slots.default">{{ label ? label : value }}</span> <slot></slot> <i class="fa fa-check pull-right"> </i> </li> </template>
css代码:
<style lang="scss" scoped> .my-option { > .fa-check { display: none; } &.selected { color: blue; > .fa-check { display: inline; } } } </style>
由于父组件select需要接收label的值,而prop不能改变,只好再定义一个myLabel标签,然后通过事件发送给父级:
myLabel: this.label || this.value
先后添加点击事件和监听的选择/取消事件:
methods: { handleClick() { this.dispatch( "mySelect", "option-click", this.selected, this.myLabel, this.value ); } }, created() { this.$on("select", value => { if (this.value === value) { this.selected = true; } }); this.$on("cancel", value => { if (this.value === value) { this.selected = false; } }); }
然后,不带样式的选项组件基本就完成了,完整代码如下:
<template> <li :class="[‘my-option‘, { selected: selected }]"> <span v-if="!$slots.default">{{ myLabel }}</span> <slot></slot> <i class="fa fa-check pull-right"> </i> </li> </template> <script> import emitter from "../mixins/emitter"; export default { name: "myOption", mixins: [emitter], props: { label: { type: String, default: "" }, value: { type: String, required: true } }, data() { return { selected: false, myLabel: this.label || this.value }; }, methods: { handleClick() { this.dispatch( "mySelect", "option-click", this.selected, this.myLabel, this.value ); } }, created() { this.$on("select", value => { if (this.value === value) { this.selected = true; } }); this.$on("cancel", value => { if (this.value === value) { this.selected = false; } }); } }; </script> <style lang="scss" scoped> .my-option { > .fa-check { display: none; } &.selected { color: blue; > .fa-check { display: inline; } } } </style>
标签:列表项 handle font -o 直接 com 序列 工程 pac
原文地址:https://www.cnblogs.com/viewts/p/11417384.html