Regular expression which allows numbers, spaces, plus sign, hyphen and brackets

Question

I am using jquery validator where I have added a method to validate a string which allow only numbers, spaces, plus sign, hyphen and brackets. Number is mandatory in the string but other charterer is optional.

My code for adding method in jquery validor:

jQuery.validator.addMethod( "regex", function(value, element, regexp) {         var re = new RegExp(regexp);         return this.optional(element) || re.test(value);     },     "Please check your input." ); 

Following code for the rules:

rules: { myfield: {     required: true,     regex: "[0-9]+" // want to add regular expression but I wrote only for digit which works but do not understand how to reach at my requirements.  }, } 

Answer 1

You can add the required characters into character class as

/^(?=.*[0-9])[- +()0-9]+$/ 

Regex Demo

Regex Explanation

• (?=.*[0-9]) postive look ahead. Ensures that there is atleast one digit

• [- +()0-9]+ matches numbers, spaces, plus sign, hyphen and brackets

OR

If you are reluctant in using look aheads. You could write without them a lenghier regex as

/^[- +()]*[0-9][- +()0-9]*$/