小编ilh*_*han的帖子

我想在 Angular 5 中创建一个自定义选择输入控件。我有一个实现 SelectControlValueAccessor 的组件。当我实现如下所示的课程时。它在代码注释中给出了错误。

import { Component, Input, forwardRef, SimpleChanges, OnChanges } from '@angular/core';
import {  SelectControlValueAccessor } from '@angular/forms';
import { SELECT_VALUE_ACCESSOR } from '@angular/forms/src/directives/select_control_value_accessor';

@Component({    
    selector: 'select-input',
    template: ` `,
    providers: [
        {   
          provide: SELECT_VALUE_ACCESSOR,
            useExisting: forwardRef(() => SelectInputComponent),
            multi: true
        }
    ]
})

/*
[ts]
Class 'SelectInputComponent' incorrectly implements class 'SelectControlValueAccessor'. Did you mean to extend 'SelectControlValueAccessor' and inherit its members as a subclass?
  Property '_renderer' is missing in type 'SelectInputComponent'.
class SelectInputComponent
*/
export …