Javascript 修改我的代码，我想用自动完成功能替换输入框的选择下拉列表

由于我是angular中的noob，我真的需要一个指导，比如如何将此选择选项下拉列表替换为simple输入框。我正在从api中获取数据，目前我的api中的数据有限，因此使用“选择选项”下拉列表可以正常工作，但我的api将包含大量数据，因此我不希望我的用户滚动和搜索数据。相反，我希望他们键入并获取并选择该项目。这里我分享我的代码，我实现了选择选项下拉方法。请将我的代码修改到该输入框

元数据-service.service.ts

Pincode.ts

register-page.component.ts

register-page.component.html

{{pin.pincode}}
{{modifiedText}}

---

修改您可以简单地使用ng select和typeahead特性，按照这里提到的教程操作

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { Pincodes } from 'src/app/Model/Pincodes';
import { baseURL } from 'src/environments/environment';

@Injectable({
  providedIn: 'root'
})
export class MetadataServiceService {

  constructor(private http:HttpClient) { }

  public GetPincodes() : Observable<any> {
    console.log("Calling GetPincodes API")
    return this.http.get("/Metadata/api/metadata/getpincodes") // My API Link
  }

}

{
  "program": null,
  "version": null,
  "dateTime": null,
  "success": true,
  "errorCode": null,
  "errorMessage": null,
  "message": "Pincodes read Successfully",
  "data": [
    {
      "pincode": 400708,
      "village": "Airoli",
      "taluka": "Thane",
      "district": "Thane",
      "state": "Maharashtra"
    },
    {
      "pincode": 416007,
      "village": "Kaamba",
      "taluka": "Kalyan",
      "district": "Thane",
      "state": "Maharashtra"
    },
    {
      "pincode": 421102,
      "village": "Atali",
      "taluka": "Kalyan",
      "district": "Thane",
      "state": "Maharashtra"
    },
    {
      "pincode": 421501,
      "village": "Ambarnath",
      "taluka": "Ambarnath",
      "district": "Thane",
      "state": "Maharashtra"
    },
    {
      "pincode": 421503,
      "village": "Ambeshiv",
      "taluka": "Ambarnath",
      "district": "Thane",
      "state": "Maharashtra"
    }
  ]
}

export class Pincodes {
    pincode : number
    village : string
    taluka : string
    district : string
    state : string
}

import { Component, OnInit } from '@angular/core';
import { Pincodes } from '../classes/pincodes';
import { MetaDataService } from '../services/meta-data.service';
import { FormBuilder, FormControl } from '@angular/forms';
import { Observable } from 'rxjs';

@Component({
  selector: 'app-register-page',
  templateUrl: './register-page.component.html',
  styleUrls: ['./register-page.component.css']
})
export class RegisterPageComponent implements OnInit {
  observeData: Pincodes[]
  modifiedText: any;
  PinSelected: any = {}


  constructor(private _metaDataAPI: MetaDataService) {

  }

  ngOnInit() {
    this._metaDataAPI.getData().subscribe(data => {
      this.observeData = data;
    });

  }

  onPincodeSelected(val: Pincodes) {
    console.log("value" + val);
    this.customFunction(val)

  }
  customFunction(val: Pincodes) {
    // this.modifiedText = "The Selected Pin :  " + val.pincode +
    //  " and selected District is " + val.village
    this.modifiedText = "Selected Pin : " + val.pincode + "\n" +
      "District : " + val.district + "\n" +
      "Taluka : " + val.taluka


    console.log("Modified Text: " + this.modifiedText);
    console.log("Pincode Selected: " + this.PinSelected);
    console.log("observeData Selected: " + this.observeData);

  }


}

<select
        [(ngModel)]="PinSelected"
        (ngModelChange)="onPincodeSelected($event)"
      >
        <option *ngFor="let pin of observeData" [ngValue]="pin">
          {{ pin.pincode }}
        </option>
      </select>
      <div>
        <p>{{ modifiedText }}</p>
      </div>