Improvement of wechat applet 28 hot search list ①

28.1 Hot search list 、placeholder Dynamic data

---

Interface http://localhost:3000/search/default

onLoad(options) {
    
        this.getInitData();
    },

    //  Get initialized data 
    async getInitData() {
    
        let placeholderData = await request("search/default",{
    });
        this.setData({
    
            placeholderContent: placeholderData.data.showKeyword
        });
    },

<input type="text" placeholder="{
     {placeholderContent}}" placeholder-class="placeholder"></input>

Interface http://localhost:3000/search/hot/detail

    onLoad(options) {
    
        this.getInitData();
    },

    //  Get initialized data 
    async getInitData() {
    
        let placeholderData = await request("search/default",{
    });
        let hotListData = await request("search/hot/detail");
        this.setData({
    
            placeholderContent: placeholderData.data.showKeyword,
            hotList: hotListData.data
        });
    },

<view class="searchContainer">
<!--  Head -->
    <view class="header">
        <view class="searchInput">
            <text class="iconfont icon-search searchIcon"></text>
            <input type="text" placeholder="{
     {placeholderContent}}" placeholder-class="placeholder"></input>
        </view>
        <text class="cancel"> Cancel </text>
    </view>
<!-- Hot search list -->
    <view class="hotContainer">
        <view class="title"> Hot search list </view>
<!--  Hot search list -->
        <view class="hotList">
            <view class="hotItem" wx:for="{
     {hotList}}" wx:key="score">
                <text class="order">{
   {index + 1}}</text>
                <text>{
   {item.searchWord}}</text>
                <image class="iconImg" wx:if="{
     {item.iconUrl}}" src="{
     {item.iconUrl}}"></image>
            </view>
        </view>
    </view>

</view>

---

28.2 Fuzzy matching search data

bindinput event ： Whether or not you lose focus , Just change the content , All trigger .

bindcheck event ： You need to lose focus to trigger this event .

Interface http://localhost:3000/search?keywords=fade&limit=10

<input bindinput="handelInputChange" type="text" input placeholder="{
     {placeholderContent}}" placeholder-class="placeholder"></input>

    data: {
    
        placeholderContent: '', // placeholder  Content 
        hotList: [], //  Hot search list data 
        searchContent: '', //  Form item data entered by the user 
        searchList: [], //  Keyword fuzzy matching data 
    },

//  obtain   Function of searching data 

    async getSearchList(){
    
        let searchListData = await request("search", {
    keywords: this.data.searchContent, limit: 10});
        this.setData({
    
            searchList: searchListData.result.songs
        })
    },

    //  The event that the content of the form changes 
    handelInputChange(event) {
    
        console.log(event);
        this.setData({
    
            searchContent: event.detail.value.trim()
        });

        //  Function throttling 
        if (isSend) {
    
            return;
        }
        isSend = true;

        setTimeout(() => {
    
            isSend = false;
            this.getSearchList();
        }, 1000);

    },

---

28.3 Search content display

1. Write it html General structure

<view class="searchContainer">
<!--  Head -->
    <view class="header">
        <view class="searchInput">
            <text class="iconfont icon-search searchIcon"></text>
            <input bindinput="handelInputChange" type="text" input placeholder="{
     {placeholderContent}}" placeholder-class="placeholder"></input>
        </view>
        <text class="cancel"> Cancel </text>
    </view>
    <block wx:if="{
     {searchList.length}}">
        <!--  Search content display -->
        <view class="showSearchContent">
            <view class="searchContent"> Search content ：{
   {searchContent}}</view>
            <view class="searchList">
                <view class="searchItem" wx:for="{
     {searchList}}" wx:key="id">
                    <text class="iconfont icon-search"></text>
                    <text>{
   {item.name}}</text>
                </view>
            </view>
        </view>
    </block>

    <block wx:else>
        <!-- Hot search list -->
        <view class="hotContainer">
            <view class="title"> Hot search list </view>
            <!--  Hot search list -->
            <view class="hotList">
                <view class="hotItem" wx:for="{
     {hotList}}" wx:key="score">
                    <text class="order">{
   {index + 1}}</text>
                    <text>{
   {item.searchWord}}</text>
                    <image class="iconImg" wx:if="{
     {item.iconUrl}}" src="{
     {item.iconUrl}}"></image>
                </view>
            </view>
        </view>
    </block>

</view>

/* pages/search/search.wxss */

.searchContainer {
    
    padding: 0 20rpx;
}

.header {
    
    display: flex;
    height: 60rpx;
    line-height: 60rpx;
    padding: 10rpx 0;
}

.searchInput {
    
    position: relative;
    flex: 1;
    background: rgba(237,237,237,0.3);
    border-right: 30rpx;
}

.cancel {
    
    width: 100rpx;
    text-align: center;
}

.searchIcon {
    
    position: absolute;
    left: 15rpx;
}

.searchInput input{
    
    margin-left: 50rpx;
    height: 60rpx;
}

/*h5  One of the new features , Can be  placeholder  Set up  class  and   style */
.placeholder {
    
    color: #d43c33;
    font-size: 28rpx;
}

/* Hot search list */
.hotContainer .title {
    
    font-size: 28rpx;
    height: 80rpx;
    line-height: 80rpx;
    border-bottom: 1rpx solid #eee;
}

.hotList {
    
    display: flex;
    flex-wrap: wrap;
}

.hotItem {
    
    width: 50%;
    height: 80rpx;
    line-height: 80rpx;
    font-size: 26rpx;
}

.hotItem .order {
    
    margin: 0 10rpx;
}

.hotItem .iconImg {
    
    width: 35rpx;
    height: 20rpx;
    margin-left: 10rpx;
}

/* Search content display */

.searchContent {
    
    color: rgba(107, 100, 238, 0.96);
    height: 80rpx;
    line-height: 82rpx;
    font-size: 24rpx;
    border-bottom: 1rpx solid #d43c33;
}

.searchItem {
    
    height: 80rpx;
    line-height: 80rpx;
    display: flex;
}

.searchItem .content {
    
    flex: 1;
    margin-left: 20rpx;
    border-bottom: 1rpx solid #eee;
    font-size: 26rpx;
}

// pages/search/search.js
import request from "../../utils/request";
let isSend = false; //  be used for   function   Throttling use 
Page({
    

    /** *  Initial data of the page  */
    data: {
    
        placeholderContent: '', // placeholder  Content 
        hotList: [], //  Hot search list data 
        searchContent: '', //  Form item data entered by the user 
        searchList: [], //  Keyword fuzzy matching data 
    },

    /** *  Life cycle function -- Monitor page loading  */
    onLoad(options) {
    
        this.getInitData();
    },

    //  Get initialized data 
    async getInitData() {
    
        let placeholderData = await request("search/default",{
    });
        let hotListData = await request("search/hot/detail");
        this.setData({
    
            placeholderContent: placeholderData.data.showKeyword,
            hotList: hotListData.data
        });
    },

    //  obtain   Function of searching data 

    async getSearchList(){
    
        if(!this.data.searchContent){
    
            this.setData({
    
                searchList: []
            });
            return;
        }
        let searchListData = await request("search", {
    keywords: this.data.searchContent, limit: 10});
        this.setData({
    
            searchList: searchListData.result.songs
        })
    },

    //  The event that the content of the form changes 
    handelInputChange(event) {
    
        console.log(event);
        this.setData({
    
            searchContent: event.detail.value.trim()
        });

        //  Function throttling 
        if (isSend) {
    
            return;
        }
        isSend = true;

        setTimeout(() => {
    
            isSend = false;
            this.getSearchList();
        }, 500);

    },

    /** *  Life cycle function -- Listening page first rendering completed  */
    onReady() {
    

    },

    /** *  Life cycle function -- Monitor page display  */
    onShow() {
    

    },

    /** *  Life cycle function -- Monitor page hidden  */
    onHide() {
    

    },

    /** *  Life cycle function -- Monitor page uninstall  */
    onUnload() {
    

    },

    /** *  Page related event handler -- Monitor user pull-down action  */
    onPullDownRefresh() {
    

    },

    /** *  Handling function of page pull bottom event  */
    onReachBottom() {
    

    },

    /** *  Users click the upper right corner to share  */
    onShareAppMessage() {
    

    }
})