ElementUI安装与使用指南

Select 选择器

点击下载learnelementuispringboot项目源码

效果图

el-select.vue（Select选择器）页面效果图

项目里el-select.vue代码

<script>
export default {name: 'el_select',data() {return {options: [{value: '选项1',label: '黄金糕'}, {value: '选项2',label: '双皮奶',disabled: true}, {value: '选项3',label: '蚵仔煎'}, {value: '选项4',label: '龙须面'}, {value: '选项5',label: '北京烤鸭'}],value: '',value1: [],value2: [],cities: [{value: 'Beijing',label: '北京'}, {value: 'Shanghai',label: '上海'}, {value: 'Nanjing',label: '南京'}, {value: 'Chengdu',label: '成都'}, {value: 'Shenzhen',label: '深圳'}, {value: 'Guangzhou',label: '广州'}],value3: '',options2: [{label: '热门城市',options: [{value: 'Shanghai',label: '上海'}, {value: 'Beijing',label: '北京'}]}, {label: '城市名',options: [{value: 'Chengdu',label: '成都'}, {value: 'Shenzhen',label: '深圳'}, {value: 'Guangzhou',label: '广州'}, {value: 'Dalian',label: '大连'}]}],value4: '',options3: [],value5: [],list: [],loading: false,states: ["Alabama", "Alaska", "Arizona","Arkansas", "California", "Colorado","Connecticut", "Delaware", "Florida","Georgia", "Hawaii", "Idaho", "Illinois","Indiana", "Iowa", "Kansas", "Kentucky","Louisiana", "Maine", "Maryland","Massachusetts", "Michigan", "Minnesota","Mississippi", "Missouri", "Montana","Nebraska", "Nevada", "New Hampshire","New Jersey", "New Mexico", "New York","North Carolina", "North Dakota", "Ohio","Oklahoma", "Oregon", "Pennsylvania","Rhode Island", "South Carolina","South Dakota", "Tennessee", "Texas","Utah", "Vermont", "Virginia","Washington", "West Virginia", "Wisconsin","Wyoming"],options4: [{value: 'HTML',label: 'HTML'}, {value: 'CSS',label: 'CSS'}, {value: 'JavaScript',label: 'JavaScript'}],value6: [],}},mounted() {this.list = this.states.map(item => {return {value: `value:${item}`, label: `label:${item}`};});},methods: {remoteMethod(query) {if (query !== '') {this.loading = true;setTimeout(() => {this.loading = false;this.options3 = this.list.filter(item => {return item.label.toLowerCase().indexOf(query.toLowerCase()) > -1;});}, 200);} else {this.options3 = [];}}},
}</script><template><div class="el_select_root"><h2>Select 选择器</h2><h5>当选项过多时，使用下拉菜单展示并选择内容。</h5><h3>一、基础用法</h3><h5>适用广泛的基础单选</h5><h5>v-model的值为当前被选中的el-option的 value 属性值</h5><el-select v-model="value" placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>二、有禁用选项</h3><h5>在el-option中，设定disabled值为 true，即可禁用该选项</h5><el-select v-model="value" placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value":disabled="item.disabled"></el-option></el-select><h3>三、禁用状态</h3><h5>选择器不可用状态</h5><h5>为el-select设置disabled属性，则整个选择器不可用</h5><el-select v-model="value" disabled placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>四、可清空单选</h3><h5>包含清空按钮，可将选择器清空为初始状态</h5><p>为el-select设置clearable属性，则可将选择器清空。需要注意的是，clearable属性仅适用于单选。</p><el-select v-model="value" clearable placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>五、基础多选</h3><h5>适用性较广的基础多选，用 Tag 展示已选项</h5><p>为el-select设置multiple属性即可启用多选，此时v-model的值为当前选中值所组成的数组。默认情况下选中值会以 Tag 的形式展现，你也可以设置collapse-tags属性将它们合并为一段文字。</p><el-select v-model="value1" multiple placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><el-selectv-model="value2"multiplecollapse-tagsstyle="margin-left: 20px;"placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>六、自定义模板</h3><h5>可以自定义备选项</h5><P>将自定义的 HTML 模板插入el-option的 slot 中即可。</P><el-select v-model="value3" placeholder="请选择"><el-optionv-for="item in cities":key="item.value":label="item.label":value="item.value"><span style="float: left">{{ item.label }}</span><span style="float: right; color: #8492a6; font-size: 13px; margin-left: 20px;">{{ item.value }}</span></el-option></el-select><h3>七、分组</h3><h5>备选项进行分组展示</h5><p>使用el-option-group对备选项进行分组，它的label属性为分组名</p><el-select v-model="value4" placeholder="请选择"><el-option-groupv-for="group in options2":key="group.label":label="group.label"><el-optionv-for="item in group.options":key="item.value":label="item.label":value="item.value"></el-option></el-option-group></el-select><h3>八、可搜索</h3><h5>可以利用搜索功能快速查找选项</h5><p>为el-select添加filterable属性即可启用搜索功能。默认情况下，Select 会找出所有label属性包含输入值的选项。如果希望使用其他的搜索逻辑，可以通过传入一个filter-method来实现。filter-method为一个Function，它会在输入值发生变化时调用，参数为当前输入值。</p><el-select v-model="value" filterable placeholder="请选择"><el-optionv-for="item in options":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>九、远程搜索</h3><h5>从服务器搜索数据，输入关键字进行查找</h5><p>为了启用远程搜索，需要将filterable和remote设置为true，同时传入一个remote-method。remote-method为一个Function，它会在输入值发生变化时调用，参数为当前输入值。需要注意的是，如果el-option是通过v-for指令渲染出来的，此时需要为el-option添加key属性，且其值需具有唯一性，比如此例中的item.value。</p><el-selectv-model="value5"multiplefilterableremotereserve-keywordplaceholder="请输入关键词":remote-method="remoteMethod":loading="loading"><el-optionv-for="item in options3":key="item.value":label="item.label":value="item.value"></el-option></el-select><h3>十、创建条目</h3><h5>可以创建并选中选项中不存在的条目</h5><p>使用allow-create属性即可通过在输入框中输入文字来创建新的条目。注意此时filterable必须为真。本例还使用了default-first-option属性，在该属性打开的情况下，按下回车就可以选中当前选项列表中的第一个选项，无需使用鼠标或键盘方向键进行定位。</p><h5>如果 Select 的绑定值为对象类型，请务必指定 value-key 作为它的唯一性标识。</h5><el-selectv-model="value6"multiplefilterableallow-createdefault-first-optionplaceholder="请选择文章标签"><el-optionv-for="item in options4":key="item.value":label="item.label":value="item.value"></el-option></el-select></div></template><style>
.el_select_root {margin-left: 300px;margin-right: 300px;text-align: left;
}
</style>

Select Attributes

Select Events

Select Slots

Option Group Attributes

Option Attributes

Methods