用于验证电话号码的 Angular 表单验证

Question

我正在尝试使用角度中的正则表达式验证电话号码

HTML 内容

<div class="form-group row">
                <input type="text" class="form-control" appPhoneMask placeholder="Mobile Number" autocomplete="off"
                    [ngClass]="{ 'is-invalid': (f.inputCountryCode.errors && mobileNumberform.submitted) }"
                    formControlName="inputCountryCode">
                <div *ngIf="(f.inputCountryCode.invalid ) || (f.inputCountryCode.invalid && (f.inputCountryCode.dirty || f.inputCountryCode.touched))"
                    class="invalid-feedback">
                    <div *ngIf="f.inputCountryCode.errors.required">This field is required.</div>
                    <div *ngIf="f.inputCountryCode.errors.pattern">Invalid phone number.</div>
                </div>
            </div>

TS 代码

 this.$form = this.$builder.group({
      selectCountryCode: [null, Validators.required],
      inputCountryCode: [null, [Validators.required, Validators.pattern("[0-9 ]{12}")]]
    });

验证模式应该允许带有空格的数字号码，因为我使用的是电话号码掩码，它在 3 位数字后添加空格。

模式无效，电话号码验证错误

Angular 4 Mobile number validation

Regex for field that allows numbers and spaces

屏蔽指令

export class PhoneMaskDirective {

  constructor(public ngControl: NgControl) { }

  @HostListener('ngModelChange', ['$event'])
  onModelChange(event) {
    this.onInputChange(event, false);
  }

  @HostListener('keydown.backspace', ['$event'])
  keydownBackspace(event) {
    this.onInputChange(event.target.value, true);
  }


  onInputChange(event, backspace) {
    let newVal = event.replace(/\D/g, '');
    if (backspace && newVal.length <= 6) {
      newVal = newVal.substring(0, newVal.length - 1);
    }
    if (newVal.length === 0) {
      newVal = '';
    } else if (newVal.length <= 3) {
      newVal = newVal.replace(/^(\d{0,3})/, '$1');
    } else if (newVal.length <= 6) {
      newVal = newVal.replace(/^(\d{0,3})(\d{0,3})/, '$1 $2');
    } else if (newVal.length <= 9) {
      newVal = newVal.replace(/^(\d{0,3})(\d{0,3})(\d{0,4})/, '$1 $2 $3');
    } else {
      newVal = newVal.substring(0, 10);
      newVal = newVal.replace(/^(\d{0,3})(\d{0,3})(\d{0,4})/, '$1 $2 $3');
    }
    this.ngControl.valueAccessor.writeValue(newVal);
  }
}

Answer 1

您的正则表达式需要 12 个 [0-9 ] 符号，而您输入的仅包含 11 个。

将inputCountryCode 的正则表达式更新为"[0-9 ]{11}"：

 this.$form = this.$builder.group({
      selectCountryCode: [null, Validators.required],
      inputCountryCode: [null, [Validators.required, Validators.pattern("[0-9 ]{11}")]]
    });

或者你可以在输入的电话号码后面加一个空格，这样就变成了12个符号。

但我更愿意对电话号码使用更具体的正则表达式，例如'[0-9]{3} [0-9]{3} [0-9]{3}'，因为您的模式电话号码11 1111 111 或 111111 是有效号码

Answer 2

问题在于

Validators.pattern("[0-9 ]{12}")

替换为

Validators.pattern(new RegExp("[0-9 ]{12}"))

更改代码

this.$form = this.$builder.group({
      selectCountryCode: [null, Validators.required],
      inputCountryCode: [null, [Validators.required, Validators.pattern(new RegExp("[0-9 ]{12}"))]]
    });

Answer 3

你可以使用

Validators.pattern("(09)[0-9 ]{9}")

示例：09112223333

条件： number 必须以 '09' 开头，应该是数字和固定长度（在此示例中为 11 位）

Answer 4

您可以允许：

• 9999 9999
• +61 2 9999 9999
• (02) 9999 9999

Validators.pattern('[- +()0-9]+')

Answer 5

另一个想法，类似地，您实际上可以强制输入值以保持电话格式，这是美国格式 123-123-1234 的示例。首先我们限制用户只输入数字：

//Number formatting in your .ts file
  public numbersOnlyValidator(event: any) {
    const pattern = /^[0-9\-]*$/;
    if (!pattern.test(event.target.value)) {
      event.target.value = event.target.value.replace(/[^0-9\-]/g, "");
    }
  }

然后，我们在 html 中添加带有指令 phoneMask 的电话字段：

 <div class="form-group row">
           <input 
             type="text" 
             placeholder="phone number xxx-xxx-xxxx" 
             class="form-control" 
             id="phone" 
             name="phone" 
             maxlength="12"
            [(ngModel)]="phone" 
            phoneMask
            [ngClass]="{ 'is-invalid': phone.touched || form.submitted && phone.invalid }"
            #phone="ngModel" 
            phoneMask 
            (input)="numbersOnlyValidator($event)" />

            <div *ngIf="(phone.touched || form.submitted) &&
                phone.invalid" class="invalid-feedback">
                  <div *ngIf="phone.errors">
                    Please enter valid phone number.
                  </div>
                </div>
 </div>

这里你只过滤数字(input)="numbersOnlyValidator($event)"

这是 html 中使用的指令 phoneMask，您实际上将输入格式化为虚线模式 NNN-NNN-NNNN：

import { Directive, HostListener } from '@angular/core';

@Directive({
  selector: '[phoneMask]'
})
export class PhoneMasksDirective {

  constructor() { }

  @HostListener('input', ['$event'])
  onKeyDown(event: KeyboardEvent) {
    const input = event.target as HTMLInputElement;
    let trimmed = input.value.replace(/\s+/g, '');

    if (trimmed.length > 12) {
      trimmed = trimmed.substr(0, 12);
    }
 
    trimmed = trimmed.replace(/-/g,'');

    let numbers = [];
    numbers.push(trimmed.substr(0,3));
    if(trimmed.substr(3,3)!=="")
    numbers.push(trimmed.substr(3,3));
    if(trimmed.substr(6,4)!="")
    numbers.push(trimmed.substr(6,4));
    input.value = numbers.join('-');

  }

}

演示stackblitz