前言
之前那個typeahead寫的太早,不滿足當前的業務需求
而且有些瑕疵,還有也不方便傳入資料和響應資料..
於是就推倒了重來,寫了個V2的版本
看圖,多了一些細節的考慮;精簡了實現的邏輯程式碼
效果圖
實現的功能
- 滑鼠點選下拉框之外的區域關閉下拉框
- 支援鍵盤上下鍵選擇,支援滑鼠選擇
- 支援列表過濾搜尋
- 支援外部傳入列表JSON格式的對映
- 支援placeholder的傳入
- 選中物件的響應(
.syncvue2.3的元件通訊的語法糖) - 箭頭icon的對映,感覺作用不大,移除了
你能學到什麼
見仁見智哈
用法
<select-search
style="max-width:195px"
placeholder="請選擇廣告主"
:asyncData.sync="adHostData"
:mapData="adHostDataList"
:mapDataFormat="{label:`userName`,value:`userId`}">
</select-search>複製程式碼asyncData:響應的資料,也就是選中的..回來是一個物件mapData: 搜尋的列表資料,肯定是外部傳入了…mapDataFormat: 列表值對映
程式碼
- selectSearch.vue
<template>
<div class="select-search" v-if="typeaheadData" ref="selectSearch" @click.native="showHideMenu($event)">
<div class="select-header">
<input type="text" autocomplete="off" readonly :placeholder="placeholder" :value="placeholderValue" @keydown.down.prevent="selectChildWidthArrowDown" @keydown.up.prevent="selectChildWidthArrowUp" @keydown.enter="selectChildWidthEnter">
<i class="fzicon " :class="isExpand?`fz-ad-jiantou1`:`fz-ad-jiantou`"></i>
</div>
<div class="select-body" v-if="isExpand && typeaheadData">
<input type="text" placeholder="關鍵字" v-model="searchVal" autocomplete="off" @keydown.esc="resetDefaultStatus" @keydown.down.prevent="selectChildWidthArrowDown" @keydown.up.prevent="selectChildWidthArrowUp" @keydown.enter="selectChildWidthEnter">
<transition name="el-fade-in-linear" mode="out-in">
<div class="typeahead-filter">
<transition-group tag="ul" name="el-fade-in-linear" v-show="typeaheadData.length>0">
<li v-for="(item,index) in typeaheadData" :key="index" :class="item.active ? `active`:``" @mouseenter="setActiveClass(index)" @mouseleave="setActiveClass(index)" @click="selectChild(index)">
<a href="javascript:;">
{{item[mapDataFormat.label]}}
</a>
</li>
</transition-group>
<p class="noFound" v-show="typeaheadData && typeaheadData.length === 0">未能查詢到,請重新輸入!</p>
</div>
</transition>
</div>
</div>
</template>
<script>
export default {
name: `selectSearch`,
data: function () {
return {
placeholderValue: ``,// 給看到選擇內容的
isExpand: false,
searchVal: ``, // 搜尋關鍵字
resultVal: ``, // 儲存搜尋到的值
searchList: [], //儲存過濾的結果集
currentIndex: -1, // 當前預設選中的index,
}
},
computed: {
mapFormatData () { // 外部有傳入格式的時候對映mapData
return this.mapData.map(item => {
item[this.mapDataFormat.value] = item[this.mapDataFormat.value];
return item;
});
},
typeaheadData () {
let temp = [];
if (this.searchVal && this.searchVal === ``) {
return this.mapFormatData;
} else {
this.currentIndex = -1; // 重置特殊情況下的索引
this.mapFormatData.map(item => {
if (item[this.mapDataFormat.label].indexOf(this.searchVal.toLowerCase().trim()) !== -1) {
temp.push(item)
}
return item;
})
return temp;
}
}
},
props: {
placeholder: {
type: String,
default: `--請選擇--`
},
emptyText: {
type: String,
default: `暫無資料`
},
mapData: { // 外部傳入的列表資料
type: Array,
default: function () {
return []
}
},
mapDataFormat: { // 對映傳入資料的格式
type: Object,
default: function () {
return {
label: `text`,
value: `value`,
extraText: `extraText`
}
}
},
asyncData: { // 實時響應的值
type: [Object, String],
default: function () {
return {}
}
}
},
methods: {
showHideMenu (e) { // 點選其他區域關閉下拉選單
if (e) {
if (this.$refs.selectSearch && this.$refs.selectSearch.contains(e.target)) {
this.isExpand = true;
} else {
this.isExpand = false;
}
}
},
resetDefaultStatus () { // 清除所有選中狀態
this.searchVal = ``;
this.currentIndex = -1;
this.typeaheadData.map(item => {
this.$delete(item, `active`);
})
},
setActiveClass (index) { // 設定樣式活動類
this.typeaheadData.map((item, innerIndex) => {
if (index === innerIndex) {
this.$set(item, `active`, true);
this.currentIndex = index; // 這句話是用來修正index,就是鍵盤上下鍵的索引,不然會跳位
} else {
this.$set(item, `active`, false)
}
})
},
selectChildWidthArrowDown () {
// 判斷index選中子項
if (this.currentIndex < this.typeaheadData.length) {
this.currentIndex++;
this.typeaheadData.map((item, index) => {
this.currentIndex === index ? this.$set(item, `active`, true) : this.$set(item, `active`, false);
})
}
},
selectChildWidthArrowUp () {
// 判斷index選中子項
if (this.currentIndex > 0) {
this.currentIndex--;
this.typeaheadData.map((item, index) => {
this.currentIndex === index ? this.$set(item, `active`, true) : this.$set(item, `active`, false);
})
}
},
selectChildWidthEnter () {
// 若是結果集只有一個,則預設選中
if (this.typeaheadData.length === 1) {
this.$emit(`update:asyncData`, this.typeaheadData[0]); // emit響應的值
this.placeholderValue = this.typeaheadData[0][this.mapDataFormat.label];
} else {
// 若是搜尋的內容完全匹配到項內的內容,則預設選中
this.typeaheadData.map(item => {
if (this.searchVal === item[this.mapDataFormat.label] || item.active === true) {
this.$emit(`update:asyncData`, item); // emit響應的值
this.placeholderValue = item[this.mapDataFormat.label];
}
})
}
this.isExpand = false;
},
selectChild (index) {
// 滑鼠點選選擇子項
this.typeaheadData.map((item, innerIndex) => {
if (index === innerIndex || item.active) {
this.placeholderValue = item[this.mapDataFormat.label];
this.$emit(`update:asyncData`, item); // emit響應的值
}
});
this.isExpand = false;
},
},
mounted () {
window.addEventListener(`click`, this.showHideMenu);
},
beforeDestroy () {
window.removeEventListener(`click`, this.showHideMenu);
},
watch: {
`isExpand` (newValue) {
if (newValue === false) {
this.resetDefaultStatus();
}
}
}
}
</script>
<style scoped lang="scss">
.el-fade-in-linear-enter-active,
.el-fade-in-linear-leave-active,
.fade-in-linear-enter-active,
.fade-in-linear-leave-active {
transition: opacity .2s linear;
}
.el-fade-in-enter,
.el-fade-in-leave-active,
.el-fade-in-linear-enter,
.el-fade-in-linear-leave,
.el-fade-in-linear-leave-active,
.fade-in-linear-enter,
.fade-in-linear-leave,
.fade-in-linear-leave-active {
opacity: 0;
}
.noFound {
text-align: center;
}
.select-search {
position: relative;
z-index: 1000;
a {
color: #333;
text-decoration: none;
padding: 5px;
}
ul {
list-style: none;
padding: 6px 0;
margin: 0;
max-height: 200px;
overflow-x: hidden;
overflow-y: auto;
li {
display: block;
width: 100%;
padding: 5px;
font-size: 14px;
padding: 8px 10px;
position: relative;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
color: #48576a;
height: 36px;
line-height: 1.5;
box-sizing: border-box;
cursor: pointer;
&.active {
background-color: #20a0ff;
a {
color: #fff;
}
}
}
}
.select-header {
position: relative;
border-radius: 4px;
border: 1px solid #bfcbd9;
outline: 0;
padding: 0 8px;
>input {
border: none;
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
width: 100%;
outline: 0;
box-sizing: border-box;
color: #1f2d3d;
font-size: inherit;
height: 36px;
line-height: 1;
}
>i {
transition: all .3s linear;
display: inline-block;
position: absolute;
right: 3%;
top: 50%;
transform: translateY(-50%);
}
}
.select-body {
position: absolute;
border-radius: 2px;
background-color: #fff;
box-sizing: border-box;
margin: 5px 0;
padding: 8px;
width: 100%;
box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
>input {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
background-color: #fff;
background-image: none;
border-radius: 4px;
border: 1px solid #bfcbd9;
box-sizing: border-box;
color: #1f2d3d;
font-size: inherit;
height: 36px;
line-height: 1;
outline: 0;
padding: 3px 10px;
transition: border-color .2s cubic-bezier(.645, .045, .355, 1);
width: 100%;
display: inline-block;
&:focus {
outline: 0;
border-color: #20a0ff;
}
}
}
}
</style>複製程式碼總結
對一些小夥伴若是有些許幫助,就是這文章最大的價值;
有更好的實現方式可以往下面留言,謝謝
