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Wuilmer Medrano
Asked: 2020-01-12 16:41:06 +0800 CST 2020-01-12 16:41:06 +0800 CST

Why when using pattern does it validate some passwords?

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I have a field passwordand a pattern, but it only validates some passwords for me.

Pattern policy:

  • Minimum 8 characters
  • An uppercase letter
  • a lowercase letter
  • A special character ( !#$%&/()?¡_-)

I use the Ionic 2 framework .

I am doing the validation like this:

public passRegex ="(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$" return this.formBuilder.group({
  correo: ['',Validators.compose([Validators.required,Validators.pattern(this.emailRegex)])],
  confirmarEmail: ['',Validators.compose([Validators.required,Validators.pattern(this.emailRegex)])],
  passwordRetry: this.formBuilder.group({
    clave: ['', [Validators.pattern(this.passRegex)]],
    passwordConfirmation: ['', [Validators.pattern(this.passRegex)]]
  },{validator:this.compararPass('clave','passwordConfirmation')})
},{validator:this.compararEmail('correo','confirmarEmail')});

If I put the chain it Ejemploj#240518works, but if I put Pruebaenki#123456it it doesn't work.

ionic info:
Your system information:

Cordova CLI: 6.4.0
Ionic Framework Version: 2.0.0-rc.2
Ionic CLI Version: 2.1.8
Ionic App Lib Version: 2.1.4
Ionic App Scripts Version: 0.0.43
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Linux 4.8
Node Version: v6.5.0
Xcode version: Not installed

ionic

1 Answers

  1. Best Answer

    The following regular expression matches a string of at least 8 characters, with 1 lowercase letter, 1 uppercase letter, and a symbol between !#$%&/()?¡_-. It does not consider letters with accents, ñor other diacritics such as lowercase or uppercase.

    Regex:

    (?=.*[-!#$%&/()?¡_])(?=.*[A-Z])(?=.*[a-z]).{8,}

    Description:

    Remember that with a PatternValidator the regular expression will be compared against the entire string, so it is already anchored to ^(the beginning) and $(the end of the text).

    • (?=.*[-!#$%&/()?¡_])- It is a positive assertion ( positive lookahead ) that matches the following expression without consuming characters (and then returns to the position it was in before trying):

      • .*- 0 or more characters
      • [-!#$%&/()?¡_]- It is a character class ( character class ) that matches 1 character (1 symbol between the brackets).

    • (?=.*[A-Z])- Positive assertion that matches any character and then 1 uppercase. Remember that, since no character was consumed so far, we continue trying from the beginning of the text.

    • (?=.*[a-z])- Positive assertion that matches any character and then a lowercase 1. Remember that, since no character was consumed so far, we continue trying from the beginning of the text.

    • .{8,}- The dot matches any character (except \n). With {8,}we are repeating the previous structure between 8 or more times. That is, it matches 8 or more characters (any), to check the minimum length.

    demonstration:

    https://regex101.com/r/VUXm3b/2

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