网页搜索框怎么写_网页搜索框里输入不了文字

一、实现搜索框的部分代码

【注：涉及api接口和中后台数据交互】
1. 最终呈现形式：

2. 代码实现：
HTML文件中：

<!-- 搜索框部分 -->
      <div class="search-bar" fxFlexAlign="center" style=" margin: 0 auto;max-width: 700px;">
        <div ngbDropdown fxLayout="row" style="border: none;padding: 0;margin: 0;width: 100%;">
            <button class="out-btn" id="dropdownBasic1" ngbDropdownToggle fxFlex=18 style="border: none;margin-bottom: 7px;background-color: #fff;height: 36px;">
                    易出
            </button>
            <div ngbDropdownMenu aria-labelledby="dropdownBasic1" style="width: 100%;" >
                <ul class="history" fxLayout="column">
                    <li class="history-title">
                      最近搜索<button (click)="deleteHistory()" class="delete-all-btn" >清除</button>
                    </li>
                    <li *ngFor="let item of historyList;let key=index;">
                        <a (click)="doSearch1(item)">{
  
  {item}}<button (click)="deleteOneHistory(key)" class="delete-btn"><i class="material-icons">remove_circle_outline</i></button></a>
                    </li>
                </ul>
            </div>
            <input class="searcch-inp" type="text" [(ngModel)]="model" [ngbTypeahead]="search" [resultFormatter]="formatter" fxFlex (keyup)="doAdd($event)" placeholder="{ 
    { 'product-list.title3' | translate }}">
            <button class="search-btn" fxFlex="30 1 1" (click)="doSearch()" (click)="doStorage()">
                <i class="material-icons">search</i>搜索
            </button>
        </div>
      </div>

TS文件中：

export class ProductListComponent implements OnInit { 
   
  //图片懒加载
  defaultImage = '../../../assets/img/ebarter.jpg';
  protected:any;
  rprice:any=[];
  price:any=[];
  title:any=[];
  rtitle:any=[];
  local:any=[];
  rlocal:any=[];
  bgPictrue:any=[];
  bgPictrue_raw:any=[];
  bgPictrue_rep:any=[];
  bgPictrue_str:any=[];
  bgPictrue_r:any=[];
  bgPictrue_raw_r:any=[];
  bgPictrue_rep_r:any=[];
  bgPictrue_str_r:any=[];
  awsImgUrl:string = 'https://s3.cn-north-1.amazonaws.com.cn/linda-trades-archive-1/';
  public list:any;
  //声明新的对象数组
  public productList:any=[];
  public currentPage:any;

  public rlist:any;
  public pObj:any=[];
  public temp:any=[];
  //搜索商品
  price_s:any=[];
  title_s:any=[];
  local_s:any=[];
  rlocal_s:any=[];
  bgPictrue_s:any=[];
  bgPictrue_raw_s:any=[];
  bgPictrue_rep_s:any=[];
  bgPictrue_str_s:any=[];
  public pObj_s:any=[];
  //搜索商品的定义
  public slist:any;
  //声明新的对象数组
  public searchList1:any=[];

  //2.搜索提示数组
  states:any= [];
  //3.定义属性进行双向数据绑
  public model: any;
  public historyList:any=[]; //定义的数组，存储输入的值

 //3.使用服务,实例化，即初始化
    // 初始化路由
  constructor(
    private product:ProductService,
    private storageServe: StorageService,
    private sanitizer:DomSanitizer,
    public storage:StorageService,
    private route: ActivatedRoute,
    private router: Router,
    private homeService: HomeService,
    //搜索框
    private http: HttpClient,
    @Inject(API_CONFIG) private uri: string,
    ) { 
    }

  ngOnInit(): void { 
   
    //数据持久化
    console.log('页面刷新会触发这个生命周期函数');
    var searchlist:any=this.storage.get('searchlist');
    if(searchlist){ 
   
      this.historyList=searchlist;
    }

    //获得产品列表
    this.product.productlist().subscribe(product => { 
   
      console.log('productlist',product);
      var re = /:/gi;
      this.list = product;
      this.list= this.list.filter(function(item){ 
   
        return JSON.parse(item.content.toString()).isOnSale == 'yes';
   })
      var listLength = this.list.length;
      var userID = this.storageServe.getStorage('UserID');
      for(var i = 0;i<listLength;i++){ 
   
        this.pObj[i] = JSON.parse(this.list[i].content.toString());
        this.title.push(this.pObj[i].supplierAds[0].m_title);
        this.price.push(this.pObj[i].supplierAds[0].m_price);
        this.local.push(this.pObj[i].supplierAds[0].m_supplierInfo.region);
        this.bgPictrue_raw.push(this.pObj[i].supplierAds[0].m_supplierOrderId);
        this.bgPictrue_rep[i] = this.bgPictrue_raw[i].replace(re,"-");
        this.bgPictrue_str[i] = this.awsImgUrl + this.bgPictrue_rep[i] + '1000.jpg';
        this.bgPictrue.push(this.bgPictrue_str[i])
      }
      console.log(111,this.title)
  //重新创建一含对象的数组，把原来的各个属性的数组动态循环进新数组的对象里
      //console.log(11,this.pObj[0])
      for(let i=0;i<this.local.length;i++){ 
   
          var item = { 
   //创建新数组的对象属性
            bgPictrue: '',
            local: '',
            price: '',
            title: '',
            id: 0
          }
          //对对象属性进行实例化赋值
          item.bgPictrue = this.bgPictrue[i];
          item.local = this.local[i];
          item.price = this.price[i];
          item.title = this.title[i];
          item.id = this.list[i].id;
        //动态循环进数组里
        //全部商品列表
        this.productList.push(item);
        }

    //2.给搜索提示数组赋值
    for(var i = 0;i<this.title.length;i++){ 
   
      this.states[i] = this.title[i];
    }

    this.searchList1=this.productList;

    })

  }
  // 自定义方法

//1.改变页码触发的事件
  onPageChange(number: number){ 
   
    this.currentPage = number;
  }
  //2.关闭广告条
  public flag:boolean=false;
  close(){ 
   
    this.flag=true;
  }
  // 3.搜索框提示功能
  formatter = (result: string) => result.toUpperCase();
  search = (text$: Observable<string>) =>
    text$.pipe(
      debounceTime(200),
      distinctUntilChanged(),
      map(term => term === '' ? []
        : this.states.filter(v => v.toLowerCase().indexOf(term.toLowerCase()) > -1).slice(0, 10))
    )

  //4.搜索框历史记录显示和数据持久化方法
      //4.1 搜索函数
      //在搜素框里调用的搜索函数
      doSearch(){ 
   
        //console.log("输入的搜索词：",this.model);
      if(this.model == ''){ 
   
          this.price_s=[];
          this.title_s=[];
          this.local_s=[];
          this.bgPictrue_s=[];
          this.bgPictrue_raw_s=[];
          this.bgPictrue_rep_s=[];
          this.bgPictrue_str_s=[];
          this.searchList1=[];
          this.searchList1=this.productList;
      }else{ 
   
          this.price_s=[];
          this.title_s=[];
          this.local_s=[];
          this.bgPictrue_s=[];
          this.bgPictrue_raw_s=[];
          this.bgPictrue_rep_s=[];
          this.bgPictrue_str_s=[];
          this.searchList1=[];
        var temp = { 
   parameters: { 
   keyWord: this.model}}
          return this.http.get(this.uri + 'Product/Search?keyWord=' + JSON.stringify(temp)).subscribe(search => { 
   
          this.slist = search;
          //console.log('slist搜索数组：',this.slist)
          var re = /:/gi;
          for(var i = 0;i< this.slist.length;i++){ 
   
              //把json字符串转成对象
                  this.pObj_s[i] = JSON.parse(this.slist[i].content.toString());
                  this.title_s.push(this.pObj_s[i].supplierAds[0].m_title);
                  this.price_s.push(this.pObj_s[i].supplierAds[0].m_price);
                  this.local_s.push(this.pObj_s[i].supplierAds[0].m_supplierInfo.region);
                  this.bgPictrue_raw_s.push(this.pObj_s[i].supplierAds[0].m_supplierOrderId);
                  this.bgPictrue_rep_s[i] = this.bgPictrue_raw_s[i].replace(re,"-");
                  this.bgPictrue_str_s[i] = this.awsImgUrl + this.bgPictrue_rep_s[i] + '1000.jpg';

                  for(let i=0;i<this.local_s.length;i++){ 
   
                  var item = { 
   
                    bgPictrue: '',
                    local: '',
                    price: '',
                    title: '',
                    id: 0
                  }
                  item.bgPictrue = this.bgPictrue_str_s[i];
                  item.local = this.local_s[i];
                  item.price = this.price_s[i];
                  item.title = this.title_s[i];
                  item.id = this.slist[i].id;
                  this.searchList1.push(item);
                }
        }
        //console.log("输入的搜索词：",this.model);
      })
    }
  }
  //在历史记录里调用的搜索函数
      doSearch1(model:string){ 
   
        //console.log("输入的搜索词：", model);
          this.price_s=[];
          this.title_s=[];
          this.local_s=[];
          this.bgPictrue_s=[];
          this.bgPictrue_raw_s=[];
          this.bgPictrue_rep_s=[];
          this.bgPictrue_str_s=[];
          this.searchList1=[];
        var temp = { 
   parameters: { 
   keyWord: model}}
            return this.http.get(this.uri + 'Product/Search?keyWord=' + JSON.stringify(temp)).subscribe(search => { 
   
          this.slist = search;
          //console.log('slist搜索数组：',this.slist)
          var re = /:/gi;
          for(var i = 0;i< this.slist.length;i++){ 
   
              //把json字符串转成对象
                  this.pObj_s[i] = JSON.parse(this.slist[i].content.toString());
                  this.title_s.push(this.pObj_s[i].supplierAds[0].m_title);
                  this.price_s.push(this.pObj_s[i].supplierAds[0].m_price);
                  this.local_s.push(this.pObj_s[i].supplierAds[0].m_supplierInfo.region);
                  this.bgPictrue_raw_s.push(this.pObj_s[i].supplierAds[0].m_supplierOrderId);
                  this.bgPictrue_rep_s[i] = this.bgPictrue_raw_s[i].replace(re,"-");
                  this.bgPictrue_str_s[i] = this.awsImgUrl + this.bgPictrue_rep_s[i] + '.jpg';

                  for(let i=0;i<this.local_s.length;i++){ 
   
                  var item = { 
   
                    bgPictrue: '',
                    local: '',
                    price: '',
                    title: '',
                    id: 0
                  }
                  item.bgPictrue = this.bgPictrue_str_s[i];
                  item.local = this.local_s[i];
                  item.price = this.price_s[i];
                  item.title = this.title_s[i];
                  item.id = this.slist[i].id;
                  this.searchList1.push(item);
                }
        }
        //console.log("输入的搜索词：", model);
      })
    }


     //4.2 存储函数
      doStorage(){ 
   
        //if语句检查输入的值在列表中是否存在，如果=-1说明不存在，则需要push进去
        if(this.historyList.indexOf(this.model)==-1 && this.model!=''){ 
   
          this.historyList.push(this.model);//理解push是什么意思
        }
        //自动清空搜索框里填入的内容
          this.model='';
        //获取属性的值
          console.log(this.model);
        //缓存数据,实现数据持久化
        this.storage.set('searchlist',this.historyList);
      }

    //4.3 接听回车事件，一按回车就把输入的内容push到列表中(此方法暂时不用)
    //了解对象怎么表示
      doAdd(e){ 
   
        if (e.keyCode==13) { 
    //这里判断数据是否存在不可行，如果是一个对象，所以需要封装一个方法
          if(!this.historyListHasKeyword(this.historyList,this.model)){ 
   
          this.historyList.push(this.model)
          this.model='';
      }else{ 
   
        this.model='';
      }
    }
    //缓存数据，实现数据持久化
    this.storage.set('searchlist',this.historyList);//用到this一定要注意this的指向
  }
    //封装方法
    //如果数组里面有keyword返回true，否则返回false
      historyListHasKeyword(historyList:any,model:any){ 
   
        //用异步存在问题，所以用另一种方法，用到for循环
          if (!model) return false;
          for (var i=0;i<historyList.length;i++) { 
   
            if (historyList[i]==model) { 
   
              return true;
            }
          }
        return false;
      }

    //4.4 删除单个历史记录函数
      deleteOneHistory(key){ 
   
        this.historyList.splice(key,1);//splice可以在数组里删除，增加，修改一个值。在这里表示从key位置往后删除一个值。
        this.storage.set('searchlist',this.historyList);
      }
    //4.5 一次性删除历史记录
    deleteHistory(){ 
   
      alert("删除全部历史记录？")
      this.historyList.splice(0,this.historyList.length);//splice可以在数组里删除，增加，修改一个值。在这里表示从key位置往后删除一个值。
      this.storage.set('searchlist',this.historyList);
    }


}

CSS文件中：

/* 搜索框部分 */
    /* 设置搜索框的容器 */
      .search-bar{ 
   
        /* max-width: 400px; */
        height: 40px;
        background-color:#bbb;
        border: 2px solid  rgb(0, 99, 186) ;
      }
    /* 搜索文本框 */
      .search-bar .searcch-inp{ 
   
              min-width: 100px;
              /* min-width: 150px; */
              height: 36px;
              /* 去掉边框 */
              border: none;
              color:rgb(121, 121,121);
          }
    /* 易出按钮 */
       .search-bar .out-btn{ 
   
              color: rgb(0, 99, 186);
          }
    /* 搜索按钮 */
       .search-bar .search-btn{ 
   
              min-width: 100px;
              /* min-width: 120px; */
              height: 38px;
              padding: 0;
              border: none;
              color: #fff;
              background:rgb(0, 99, 186);
              text-align: center;
          }
       .search-bar .search-btn:hover{ 
   
              background:rgb(4, 51, 92);
          }
    /* 搜索图标样式 */
        .search-bar .search-btn .material-icons{ 
   
              vertical-align:bottom;
              margin-bottom: -1px;
              margin-right: 7px;
          }
    /* 清除整个历史记录按钮样式*/
        .search-bar .delete-all-btn{ 
   
              float: right;
              margin-right: 20px;
              color: rgb(0, 99, 186);
              background-color: #fff;
              border: none;
              font-weight: bold;
          }
  /* 清除单个历史记录按钮样式*/
        .search-bar .delete-btn{ 
   
              float: right;
              margin-right: 20px;
              background-color: #fff;
              color: rgb(112, 112, 112);
              border: none;
              padding: 0;
              width: 20px;
              height: 20px;
          }
        .search-bar .delete-btn .material-icons{ 
   
              vertical-align:bottom;
              color: rgb(202,202, 202);
          }
  /* 下拉框的列表样式 */
        .search-bar li{ 
   
              color:rgb(121, 121,121);
              font-size: 13px;
              line-height: 25px;
          }
        .search-bar .history-title{ 
   
              color:rgb(0, 99, 186);
              font-size: 18px;
              font-weight: bold;
              margin-bottom: 10px;
          }
        .search-bar ul{ 
   
              margin-left: 20px;
              margin-top: 15px;
          }

二、参考资料：

1. input搜索框实时检索功能实现（超简单，核心原理请看思路即可）：【项目】实现网页搜索框功能
2. 前端和中后台的数据交互（用到json数据）
参考资料如下：
「前端」Angular 中的数据交互（get jsonp post）：https://zhuanlan.zhihu.com/p/147852215
angular2——前后端交互：http://www.voidcn.com/article/p-aiycehtq-bms.html
3. 需要熟练使用API接口
4. 搜索框搜索时候的搜索值存储问题，以及需要点击两次搜索按钮才能在前端页面显示搜索的商品（存在异步问题）
参考资料——面试精选之Promise：https://juejin.cn/post/6844903625609707534

三、后续完善搜索框功能

1.前端搜索模糊搜索提示框：
功能参考链接：https://material.angular.io/components/autocomplete/examples

2.搜索框按照商品标题进行搜索：
使用indexof函数进行筛选；

今天的文章网页搜索框怎么写_网页搜索框里输入不了文字分享到此就结束了，感谢您的阅读，如果确实帮到您，您可以动动手指转发给其他人。