Angular 邮政编码验证程序无法以反应式表单验证程序模式工作

例如：12345或12345-3456

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它适用于12345，但不适用于12345-3456

  'zip': [null, {validators: [ Validators.required, Validators.pattern('^[0-9]{5}(?:-[0-9]{4})?$')]}],

^[0-9-]{5,10}(?:-[0-9]{4})?$

{5,10} => accepts min length 5 and max-length 7 you can change accordingly

 'zip': [null, {validators: [ Validators.required, Validators.pattern('^[0-9-]{5,7}(?:-[0-9]{4})?$')]}],


  12345        //output - true
  12345-3456   //output - true
  1234         //output - false