自动补全输入框

根据输入内容提供对应的输入建议。

基础用法

Autocomplete 组件提供输入建议。

fetch-suggestions 属性是返回建议输入的方法。在此示例中， querySearch(queryString, cb) 方法通过 cb(data) 给 Autocomplete 组件返回建议。

list suggestions when activated

list suggestions on input

vue

<template>
  <div class="demo-autocomplete">
    <div class="demo-block">
      <div class="demo-title">list suggestions when activated</div>
      <el-autocomplete
        v-model="state1"
        :fetch-suggestions="querySearch"
        clearable
        class="w-50"
        placeholder="Please Input"
        @select="handleSelect"
      />
    </div>
    <div class="demo-block">
      <div class="demo-title">list suggestions on input</div>
      <el-autocomplete
        v-model="state2"
        :fetch-suggestions="querySearch"
        :trigger-on-focus="false"
        clearable
        class="w-50"
        placeholder="Please Input"
        @select="handleSelect"
      />
    </div>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'

interface RestaurantItem {
  value: string
  link: string
}

const state1 = ref('')
const state2 = ref('')

const restaurants = ref<RestaurantItem[]>([])
const querySearch = (queryString: string, cb: any) => {
  const results = queryString
    ? restaurants.value.filter(createFilter(queryString))
    : restaurants.value
  // call callback function to return suggestions
  cb(results)
}
const createFilter = (queryString: string) => {
  return (restaurant: RestaurantItem) => {
    return (
      restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
    )
  }
}
const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' },
  ]
}

const handleSelect = (item: Record<string, any>) => {
  console.log(item)
}

onMounted(() => {
  restaurants.value = loadAll()
})
</script>

<style scoped>
.demo-autocomplete {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.demo-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.demo-title {
  font-size: 0.875rem;
  color: var(--el-text-color-secondary);
  min-height: 2.5em;
  display: flex;
  align-items: center;
}

@media screen and (max-width: 768px) {
  .demo-autocomplete {
    gap: 1rem;
  }

  .demo-block {
    width: 100%;
  }
}
</style>

自定义模板

自定义如何显示输入建议。

使用 scoped slot 自定义输入建议。在这个范围中，你可以使用 item 键来访问当前输入建议对象。

vue

<template>
  <el-autocomplete
    v-model="state"
    :fetch-suggestions="querySearch"
    popper-class="my-autocomplete"
    placeholder="Please input"
    @select="handleSelect"
  >
    <template #suffix>
      <el-icon class="el-input__icon" @click="handleIconClick">
        <edit />
      </el-icon>
    </template>
    <template #default="{ item }">
      <div class="value">{{ item.value }}</div>
      <span class="link">{{ item.link }}</span>
    </template>
  </el-autocomplete>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'
import { Edit } from '@element-plus/icons-vue'

interface LinkItem {
  value: string
  link: string
}

const state = ref('')
const links = ref<LinkItem[]>([])

const querySearch = (queryString: string, cb) => {
  const results = queryString
    ? links.value.filter(createFilter(queryString))
    : links.value
  // call callback function to return suggestion objects
  cb(results)
}
const createFilter = (queryString: string) => {
  return (restaurant: LinkItem) => {
    return (
      restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
    )
  }
}
const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' },
  ]
}
const handleSelect = (item: Record<string, any>) => {
  console.log(item)
}

const handleIconClick = (ev: Event) => {
  console.log(ev)
}

onMounted(() => {
  links.value = loadAll()
})
</script>

<style>
.my-autocomplete li {
  line-height: normal;
  padding: 7px;
}
.my-autocomplete li .name {
  text-overflow: ellipsis;
  overflow: hidden;
}
.my-autocomplete li .addr {
  font-size: 12px;
  color: #b4b4b4;
}
.my-autocomplete li .highlighted .addr {
  color: #ddd;
}
</style>

远程搜索

从服务端搜索数据。

自定义加载 2.5.0

修改加载区域内容

loading icon1

loading icon2

vue

<template>
  <div class="demo-autocomplete">
    <div class="demo-block">
      <div class="demo-title">loading icon1</div>
      <el-autocomplete
        v-model="state"
        :fetch-suggestions="querySearchAsync"
        class="w-50"
        placeholder="Please input"
        @select="handleSelect"
      >
        <template #loading>
          <svg class="circular" viewBox="0 0 50 50">
            <circle class="path" cx="25" cy="25" r="20" fill="none" />
          </svg>
        </template>
      </el-autocomplete>
    </div>
    <div class="demo-block">
      <div class="demo-title">loading icon2</div>
      <el-autocomplete
        v-model="state"
        :fetch-suggestions="querySearchAsync"
        class="w-50"
        placeholder="Please input"
        @select="handleSelect"
      >
        <template #loading>
          <el-icon class="is-loading">
            <svg class="circular" viewBox="0 0 20 20">
              <g
                class="path2 loading-path"
                stroke-width="0"
                style="animation: none; stroke: none"
              >
                <circle r="3.375" class="dot1" rx="0" ry="0" />
                <circle r="3.375" class="dot2" rx="0" ry="0" />
                <circle r="3.375" class="dot4" rx="0" ry="0" />
                <circle r="3.375" class="dot3" rx="0" ry="0" />
              </g>
            </svg>
          </el-icon>
        </template>
      </el-autocomplete>
    </div>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'

const state = ref('')

interface LinkItem {
  value: string
  link: string
}

const links = ref<LinkItem[]>([])

const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' },
  ]
}

let timeout: ReturnType<typeof setTimeout>
const querySearchAsync = (queryString: string, cb: (arg: any) => void) => {
  const results = queryString
    ? links.value.filter(createFilter(queryString))
    : links.value

  clearTimeout(timeout)
  timeout = setTimeout(() => {
    cb(results)
  }, 5000 * Math.random())
}
const createFilter = (queryString: string) => {
  return (restaurant: LinkItem) => {
    return (
      restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
    )
  }
}

const handleSelect = (item: Record<string, any>) => {
  console.log(item)
}

onMounted(() => {
  links.value = loadAll()
})
</script>

<style scoped>
.demo-autocomplete {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.demo-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.demo-title {
  font-size: 0.875rem;
  color: var(--el-text-color-secondary);
  min-height: 2.5em;
  display: flex;
  align-items: center;
}

@media screen and (max-width: 768px) {
  .demo-autocomplete {
    gap: 1rem;
  }
  .demo-block {
    width: 100%;
  }
}
</style>

<style>
.circular {
  display: inline;
  height: 30px;
  width: 30px;
  animation: loading-rotate 2s linear infinite;
}
.path {
  animation: loading-dash 1.5s ease-in-out infinite;
  stroke-dasharray: 90, 150;
  stroke-dashoffset: 0;
  stroke-width: 2;
  stroke: var(--el-color-primary);
  stroke-linecap: round;
}
.loading-path .dot1 {
  transform: translate(3.75px, 3.75px);
  fill: var(--el-color-primary);
  animation: custom-spin-move 1s infinite linear alternate;
  opacity: 0.3;
}
.loading-path .dot2 {
  transform: translate(calc(100% - 3.75px), 3.75px);
  fill: var(--el-color-primary);
  animation: custom-spin-move 1s infinite linear alternate;
  opacity: 0.3;
  animation-delay: 0.4s;
}
.loading-path .dot3 {
  transform: translate(3.75px, calc(100% - 3.75px));
  fill: var(--el-color-primary);
  animation: custom-spin-move 1s infinite linear alternate;
  opacity: 0.3;
  animation-delay: 1.2s;
}
.loading-path .dot4 {
  transform: translate(calc(100% - 3.75px), calc(100% - 3.75px));
  fill: var(--el-color-primary);
  animation: custom-spin-move 1s infinite linear alternate;
  opacity: 0.3;
  animation-delay: 0.8s;
}
@keyframes loading-rotate {
  to {
    transform: rotate(360deg);
  }
}
@keyframes loading-dash {
  0% {
    stroke-dasharray: 1, 200;
    stroke-dashoffset: 0;
  }
  50% {
    stroke-dasharray: 90, 150;
    stroke-dashoffset: -40px;
  }
  100% {
    stroke-dasharray: 90, 150;
    stroke-dashoffset: -120px;
  }
}
@keyframes custom-spin-move {
  to {
    opacity: 1;
  }
}
</style>

自定义头部与底部 2.10.6

你可以通过插槽来自定义下拉菜单的头部和底部。

使用插槽自定义内容。

Custom header content

Custom footer content

vue

<template>
  <div class="demo">
    <div>
      <p>Custom header content</p>
      <el-autocomplete
        v-model="headerSlotState"
        :fetch-suggestions="querySearchAsync"
        placeholder="Please input"
        @select="handleSelect"
      >
        <template #header>header content</template>
      </el-autocomplete>
    </div>
    <div>
      <p>Custom footer content</p>
      <el-autocomplete
        ref="footerAutocompleteRef"
        v-model="footerSlotstate"
        :fetch-suggestions="querySearchAsync"
        placeholder="Please input"
        @select="handleSelect"
      >
        <template #footer>
          <el-button link size="small" @click="handleClear"> Clear </el-button>
        </template>
      </el-autocomplete>
    </div>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'

const headerSlotState = ref('')
const footerSlotstate = ref('')

interface LinkItem {
  value: string
  link: string
}

const links = ref<LinkItem[]>([])

const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' },
  ]
}

let timeout: ReturnType<typeof setTimeout>
const querySearchAsync = (queryString: string, cb: (arg: any) => void) => {
  const results = queryString
    ? links.value.filter(createFilter(queryString))
    : links.value

  clearTimeout(timeout)
  timeout = setTimeout(() => {
    cb(results)
  }, 3000 * Math.random())
}
const createFilter = (queryString: string) => {
  return (restaurant: LinkItem) => {
    return (
      restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
    )
  }
}

const handleSelect = (item: Record<string, any>) => {
  console.log(item)
}

onMounted(() => {
  links.value = loadAll()
})

const footerAutocompleteRef = ref()
const handleClear = () => {
  footerSlotstate.value = ''
  footerAutocompleteRef.value.getData()
}
</script>

<style>
.demo {
  display: flex;
}

.demo > div {
  flex: 1;
  text-align: center;
}
.demo > div > .el-autocomplete {
  width: 50%;
}

.demo > div:not(:last-child) {
  border-right: 1px solid var(--el-border-color);
}
</style>

API

Attributes

属性名	说明	类型	默认值
model-value / v-model	选中项绑定值	`string`	—
placeholder	占位文本	`string`	—
clearable	是否可清空	`boolean`	false
disabled	自动补全组件是否被禁用	`boolean`	false
value-key	输入建议对象中用于显示的键名	`string`	value
debounce	获取输入建议的防抖延时，单位为毫秒	`number`	300
placement	菜单弹出位置	`enum`	bottom-start
fetch-suggestions	获取输入建议的方法，仅当你的输入建议数据 resolve 时，通过调用 `callback(data:[])` 来返回它	`Array` / `Function`	—
trigger-on-focus	whether show suggestions when input focus	`boolean`	true
select-when-unmatched	在输入没有任何匹配建议的情况下，按下回车是否触发 `select` 事件	`boolean`	false
name	等价于原生 input `name` 属性	`string`	—
aria-label a11y 2.7.2	原生 `aria-label`属性	`string`	—
hide-loading	是否隐藏远程加载时的加载图标	`boolean`	false
popper-class	下拉列表的类名	`string`	—
teleported	是否将下拉列表元素插入 append-to 指向的元素下	`boolean`	true
append-to 2.9.9	下拉框挂载到哪个 DOM 元素	`CSSSelector` / `HTMLElement`	—
highlight-first-item	是否默认高亮远程搜索结果的第一项	`boolean`	false
fit-input-width	下拉框的宽度是否与输入框相同	`boolean`	false
popper-append-to-body deprecated	是否将下拉列表插入至 body 元素。在下拉列表的定位出现问题时，可将该属性设置为 false	`boolean`	false
input props	—	—	—

Events

事件名	详情	类型
blur	当选择器的输入框失去焦点时触发	`Function`
focus	当选择器的输入框获得焦点时触发	`Function`
input	在 Input 值改变时触发	`Function`
clear	在点击由 `clearable` 属性生成的清空按钮时触发	`Function`
select	点击选中建议项时触发	`Function`
change	在 Input 值改变时触发	`Function`

Slots

插槽名	描述说明	类型
default	自定义输入建议的内容。	`object`
header 2.10.6	下拉列表顶部的内容	-
footer 2.10.6	下拉列表底部的内容	-
prefix	输入框头部内容	-
suffix	输入框尾部内容	-
prepend	输入框前置内容，在 prefix 之前	-
append	输入框后置内容，在 suffix 之后	-
loading 2.5.0	修改加载区域内容	-

Exposes

名称	详情	类型
activated	自动补全输入框是否被激活	`object`
blur	使 input 失去焦点	`Function`
close	折叠建议列表	`Function`
focus	使 input 获取焦点	`Function`
handleSelect	手动触发选中建议事件	`Function`
handleKeyEnter	手动触发键盘回车事件	`Function`
highlightedIndex	当前高亮显示选项的索引	`object`
highlight	在建议中高亮显示一个项目	`Function`
inputRef	el-input 组件实例	`object`
loading	远程获取提示内容的加载状态指示器	`object`
popperRef	el-tooltip 组件实例	`object`
suggestions	获取自动补全结果	`object`
getData 2.8.4	加载建议列表	`Function`