Select 选择器

当选项过多时，使用下拉菜单展示并选择内容。

基础用法

适用广泛的基础单选 v-model 的值为当前被选中的 option 的 value 属性值。

<script setup>
import { ref } from "vue";
import { Select } from "study-element";
const test = ref("");
const options2 = [
  { label: "1", value: "1" },
  { label: "2", value: "2" },
  { label: "3", value: "3" },
  { label: "4", value: "4", disabled: true },
];
</script>
<template>
  <Select v-model="test" placeholder="基础选择器，请选择" :options="options2" />
</template>

可清空单选

设置 clearable属性，则可将选择器清空。

<script setup>
import { ref } from "vue";
import { Select } from "study-element";
const test = ref("1");
const options2 = [
  { label: "1", value: "1" },
  { label: "2", value: "2" },
  { label: "3", value: "3" },
  { label: "4", value: "4", disabled: true },
];
</script>
<template>
  <Select
    v-model="test"
    placeholder="可清空选择器，请选择"
    :options="options2"
    clearable
  />
</template>

筛选选项

可以利用筛选功能快速查找选项。

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。

<script setup>
import { ref } from "vue";
import { Select } from "study-element";
const test = ref("");
const options2 = [
  { label: "1", value: "1" },
  { label: "2", value: "2" },
  { label: "3", value: "3" },
  { label: "4", value: "4", disabled: true },
];
</script>
<template>
  <Select
    v-model="test"
    placeholder="可以过滤的选择器，请输入"
    :options="options2"
    filterable
  />
</template>

远程搜索

输入关键字以从远程服务器中查找数据。

服务器搜索数据，输入关键字进行查找。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 为一个返回 Promise 的 Function，类型为 (value: string) => Promise<SelectOption[]> 。

示例请输入英文字母

<script setup>
import { ref } from "vue";
import { Select } from "study-element";
const test = ref("");
const 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",
];

const remoteFilter = (query) => {
  return new Promise((resolve) => {
    if (query) {
      setTimeout(() => {
        const options = states
          .filter((item) => {
            return item.toLowerCase().includes(query.toLowerCase());
          })
          .map((label) => {
            return { label, value: label };
          });
        resolve(options);
      }, 500);
    } else {
      resolve([]);
    }
  });
};
</script>
<template>
  <Select
    v-model="test"
    placeholder="搜索远程结果"
    filterable
    remote
    :remote-method="remoteFilter"
  />
</template>