Angular Reactive Forms pattern validation: Invalid regular expression












1















I have a regex for Australia phone number validation working in an AngularJS website. I have set the exact pattern in the Reactive Forms validator as follows:



 Validators.pattern(

  '/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/'

 )


The page doesn't load as it gets the following error:




Invalid regular expression: /^/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat




What is the correct way to specify this pattern when using Reactive Forms?






regex angular validation







share|improve this question


















  • 1





    ^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

    – Casimir et Hippolyte
    Jan 29 '18 at 4:04
















1















I have a regex for Australia phone number validation working in an AngularJS website. I have set the exact pattern in the Reactive Forms validator as follows:



 Validators.pattern(

  '/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/'

 )


The page doesn't load as it gets the following error:




Invalid regular expression: /^/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat




What is the correct way to specify this pattern when using Reactive Forms?






regex angular validation







share|improve this question


















  • 1





    ^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

    – Casimir et Hippolyte
    Jan 29 '18 at 4:04














1












1








1








I have a regex for Australia phone number validation working in an AngularJS website. I have set the exact pattern in the Reactive Forms validator as follows:



 Validators.pattern(

  '/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/'

 )


The page doesn't load as it gets the following error:




Invalid regular expression: /^/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat




What is the correct way to specify this pattern when using Reactive Forms?






regex angular validation







share|improve this question














I have a regex for Australia phone number validation working in an AngularJS website. I have set the exact pattern in the Reactive Forms validator as follows:



 Validators.pattern(

  '/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/'

 )


The page doesn't load as it gets the following error:




Invalid regular expression: /^/^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat




What is the correct way to specify this pattern when using Reactive Forms?






regex angular validation




regex angular validation






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Jan 29 '18 at 3:32









AnthonyAnthony

1,16311638




1,16311638








  • 1





    ^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

    – Casimir et Hippolyte
    Jan 29 '18 at 4:04














  • 1





    ^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

    – Casimir et Hippolyte
    Jan 29 '18 at 4:04








1




1





^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

– Casimir et Hippolyte
Jan 29 '18 at 4:04





^({0,1}...: the {0,1} quantifier repeats nothing. You should read a regex tutorial, in particular about quantifiers and character classes (to avoid useless alternations).

– Casimir et Hippolyte
Jan 29 '18 at 4:04












2 Answers
2






active

oldest

votes


















1














There are multiple issues:




  • The regex literal should not be used inside quotes (or use a string pattern with double escaped special chars)

  • Special chars like (, ) and + must be escaped - nothing to repeat is caused by the fact that ( (start of a capturing group) is quantified with {0,1} and that is an error


  • {0,1} is equal to ?, ( |-) can be written as [ -], (2|4|3|7|8) canbe written shorter as [23478].


So, you may use



Validators.pattern(

  '^\(?(0|\+61)[24378]\)?[ -]?[0-9]{2}[ -]?[0-9]{2}[ -]?[0-9][ -]?[0-9]{3}$'

)


Note that you may even omit ^ and $ here since the anchors will be added by Angular automatically to the string pattern.



NOTE: if the separators should be consistent, capture the first one and then use backreferences to the group value:



Validators.pattern(

  '\(?(?:0|\+61)[24378]\)?([ -]?)[0-9]{2}\1[0-9]{2}\1[0-9]\1[0-9]{3}'

)





share|improve this answer































    0














    Pass pattern as string, without / which are the delimiters for regex



    Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')






    share|improve this answer





















    • 1





      Why do I need a custom validator when there is a built-in pattern validator that should do the job?

      – Anthony
      Jan 29 '18 at 3:58











    • @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

      – Nadhir Falta
      Jan 29 '18 at 4:13











    • With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

      – Anthony
      Jan 29 '18 at 5:59











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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    1














    There are multiple issues:




    • The regex literal should not be used inside quotes (or use a string pattern with double escaped special chars)

    • Special chars like (, ) and + must be escaped - nothing to repeat is caused by the fact that ( (start of a capturing group) is quantified with {0,1} and that is an error


    • {0,1} is equal to ?, ( |-) can be written as [ -], (2|4|3|7|8) canbe written shorter as [23478].


    So, you may use



    Validators.pattern(
    
  '^\(?(0|\+61)[24378]\)?[ -]?[0-9]{2}[ -]?[0-9]{2}[ -]?[0-9][ -]?[0-9]{3}$'
    
)


    Note that you may even omit ^ and $ here since the anchors will be added by Angular automatically to the string pattern.



    NOTE: if the separators should be consistent, capture the first one and then use backreferences to the group value:



    Validators.pattern(
    
  '\(?(?:0|\+61)[24378]\)?([ -]?)[0-9]{2}\1[0-9]{2}\1[0-9]\1[0-9]{3}'
    
)





    share|improve this answer




























      1














      There are multiple issues:




      • The regex literal should not be used inside quotes (or use a string pattern with double escaped special chars)

      • Special chars like (, ) and + must be escaped - nothing to repeat is caused by the fact that ( (start of a capturing group) is quantified with {0,1} and that is an error


      • {0,1} is equal to ?, ( |-) can be written as [ -], (2|4|3|7|8) canbe written shorter as [23478].


      So, you may use



      Validators.pattern(
      
  '^\(?(0|\+61)[24378]\)?[ -]?[0-9]{2}[ -]?[0-9]{2}[ -]?[0-9][ -]?[0-9]{3}$'
      
)


      Note that you may even omit ^ and $ here since the anchors will be added by Angular automatically to the string pattern.



      NOTE: if the separators should be consistent, capture the first one and then use backreferences to the group value:



      Validators.pattern(
      
  '\(?(?:0|\+61)[24378]\)?([ -]?)[0-9]{2}\1[0-9]{2}\1[0-9]\1[0-9]{3}'
      
)





      share|improve this answer


























        1












        1








        1







        There are multiple issues:




        • The regex literal should not be used inside quotes (or use a string pattern with double escaped special chars)

        • Special chars like (, ) and + must be escaped - nothing to repeat is caused by the fact that ( (start of a capturing group) is quantified with {0,1} and that is an error


        • {0,1} is equal to ?, ( |-) can be written as [ -], (2|4|3|7|8) canbe written shorter as [23478].


        So, you may use



        Validators.pattern(
        
  '^\(?(0|\+61)[24378]\)?[ -]?[0-9]{2}[ -]?[0-9]{2}[ -]?[0-9][ -]?[0-9]{3}$'
        
)


        Note that you may even omit ^ and $ here since the anchors will be added by Angular automatically to the string pattern.



        NOTE: if the separators should be consistent, capture the first one and then use backreferences to the group value:



        Validators.pattern(
        
  '\(?(?:0|\+61)[24378]\)?([ -]?)[0-9]{2}\1[0-9]{2}\1[0-9]\1[0-9]{3}'
        
)





        share|improve this answer













        There are multiple issues:




        • The regex literal should not be used inside quotes (or use a string pattern with double escaped special chars)

        • Special chars like (, ) and + must be escaped - nothing to repeat is caused by the fact that ( (start of a capturing group) is quantified with {0,1} and that is an error


        • {0,1} is equal to ?, ( |-) can be written as [ -], (2|4|3|7|8) canbe written shorter as [23478].


        So, you may use



        Validators.pattern(
        
  '^\(?(0|\+61)[24378]\)?[ -]?[0-9]{2}[ -]?[0-9]{2}[ -]?[0-9][ -]?[0-9]{3}$'
        
)


        Note that you may even omit ^ and $ here since the anchors will be added by Angular automatically to the string pattern.



        NOTE: if the separators should be consistent, capture the first one and then use backreferences to the group value:



        Validators.pattern(
        
  '\(?(?:0|\+61)[24378]\)?([ -]?)[0-9]{2}\1[0-9]{2}\1[0-9]\1[0-9]{3}'
        
)






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 29 '18 at 8:58









        Wiktor StribiżewWiktor Stribiżew

        318k16139221




        318k16139221

























            0














            Pass pattern as string, without / which are the delimiters for regex



            Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')






            share|improve this answer





















            • 1





              Why do I need a custom validator when there is a built-in pattern validator that should do the job?

              – Anthony
              Jan 29 '18 at 3:58











            • @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

              – Nadhir Falta
              Jan 29 '18 at 4:13











            • With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

              – Anthony
              Jan 29 '18 at 5:59
















            0














            Pass pattern as string, without / which are the delimiters for regex



            Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')






            share|improve this answer





















            • 1





              Why do I need a custom validator when there is a built-in pattern validator that should do the job?

              – Anthony
              Jan 29 '18 at 3:58











            • @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

              – Nadhir Falta
              Jan 29 '18 at 4:13











            • With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

              – Anthony
              Jan 29 '18 at 5:59














            0












            0








            0







            Pass pattern as string, without / which are the delimiters for regex



            Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')






            share|improve this answer















            Pass pattern as string, without / which are the delimiters for regex



            Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Jan 29 '18 at 4:03

























            answered Jan 29 '18 at 3:57









            Nadhir FaltaNadhir Falta

            982315




            982315








            • 1





              Why do I need a custom validator when there is a built-in pattern validator that should do the job?

              – Anthony
              Jan 29 '18 at 3:58











            • @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

              – Nadhir Falta
              Jan 29 '18 at 4:13











            • With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

              – Anthony
              Jan 29 '18 at 5:59














            • 1





              Why do I need a custom validator when there is a built-in pattern validator that should do the job?

              – Anthony
              Jan 29 '18 at 3:58











            • @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

              – Nadhir Falta
              Jan 29 '18 at 4:13











            • With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

              – Anthony
              Jan 29 '18 at 5:59








            1




            1





            Why do I need a custom validator when there is a built-in pattern validator that should do the job?

            – Anthony
            Jan 29 '18 at 3:58





            Why do I need a custom validator when there is a built-in pattern validator that should do the job?

            – Anthony
            Jan 29 '18 at 3:58













            @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

            – Nadhir Falta
            Jan 29 '18 at 4:13





            @Anthony I updated my answer, can you give it a shot and let me know, I'n curious if that would solve the issue.

            – Nadhir Falta
            Jan 29 '18 at 4:13













            With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

            – Anthony
            Jan 29 '18 at 5:59





            With the updated answer I get - SyntaxError: Invalid regular expression: /^^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/$/: Nothing to repeat at new RegExp (<anonymous>)

            – Anthony
            Jan 29 '18 at 5:59


















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