Question

I have regex as follows:

     /^(\d|-|\(|\)|\+|\s){12,}$/

This will allow digits, (, ), space. But I want to ensure string contains atleast 8 digits.
Some allowed strings are as follows:

      (1323  ++24)233
      24243434 43
      ++++43435++4554345  434

It should not allow strings like:

     ((((((1213)))
     ++++232+++

Answer 1

Use Look ahead within your regex at the start..

/^(?=(.*\d){8,})[\d\(\)\s+-]{8,}$/
  ---------------
          |
          |->this would check for 8 or more digits

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(?=(.*\d){8,}) is zero width look ahead that checks for 0 to many character (i.e .*) followed by a digit (i.e \d) 8 to many times (i.e.{8,0})

(?=) is called zero width because it doesnt consume the characters..it just checks

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To restict it to 14 digits you can do

/^(?=([^\d]*\d){8,14}[^\d]*$)[\d\(\)\s+-]{8,}$/

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try it here