这是通过正确实现YourAwesomeComponent类中的ControlValueAccessor接口才实现的。上面的例子展示了反应式表单,同样的道理也适用于模板驱动表单。 在我撰写这段文字的时候,Angular 的文档目前还没有很清晰地说明如何在一个实际案例中使用_ControlValueAccessor_接口。每次我需要实现这个接口时,我都需要从网上找
import { Component, forwardRef, HostBinding, Input } from '@angular/core';import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';@Component({selector: 'rating-input',template: ` i + 1 ? 1 : 0) : 1))"><ng-container *ngIf="starred; else noStar">⭐</ng-contain...
原文链接https://hijiangtao.github.io/2020/01/30/Angular-ControlValueAccessor-Introduction-and-Example/ 参考 Angualr APIhttps://angular.io/api/forms/ControlValueAccessor Never again be confused when implementing ControlValueAccessor in Angular formshttps://indepth.dev/never-again-be-confused-when-imple...
如果你经常使用 Angular form 进行表单内容处理,了解并学会 ControlValueAccessor 接口的使用技巧会对你大有裨益。ControlValueAccesor 接口是 DOM 元素与 FormControl 之间的桥梁。拓展了 ControlValueAccessor 接口的组件可以创建属于自己的自定义 FormControl,这些自定义的 FromControl 拥有与常规的 input/radio button ...
是因为ControlValueAccessor接口中的writeValue方法只接受单个值作为参数,而不接受数组。ControlValueAccessor是Angular中用于自定义表单控件的接口,它...
Never again be confused when implementing ControlValueAccessor in Angular forms 如果你正在做一个复杂项目,必然会需要自定义表单控件,这个控件主要需要实现ControlValueAccessor接口(译者注:该接口定义方法可参考API 文档说明,也可参考Angular 源码定义)。网上有大量文章描述如何实现这个接口,但很少说到它在 Angular 表单...
import { Component, Input, forwardRef } from '@angular/core'; import { ControlValueAccessor, NG_VALUE_ACCESSOR, NG_VALIDATORS, AbstractControl, ValidatorFn, ValidationErrors, FormControl } from '@angular/forms'; export const EXE_COUNTER_VALUE_ACCESSOR: any = { provide: NG_VALUE_ACCESSOR, useEx...
import { ControlValueAccessor, FormControl, NgControl } from "@angular/forms"; export const NOOP_VALUE_ACCESSOR: ControlValueAccessor = { writeValue(): void {}, registerOnChange(): void {}, registerOnTouched(): void {} }; /** * This component can accept form control, ...
Which @angular/* package(s) are the source of the bug? forms Is this a regression? No Description There is a custom value accessor for editing complex value: uses inner FormGroup provides validation validate(control: AbstractControl): ValidationErrors | null { return this.innerForm.valid ? nul...
Example with Lazy Loaded Input:https://stackblitz.com/edit/angular-control-value-accessor-lazy-input-example-tsmean Example with Button:https://stackblitz.com/edit/angular-control-value-accessor-button-example-tsmean Nested Forms Note that Control Value Accessors are NOT the right tool for nested ...