如何在数字正则表达式中保留空格？

Question

I want to validate 'int' field with javascript regular expression.

I am using this RE string

var numbers =/^[0-9]+$/; 

This expresion does not allow spaces in the text box.

How do I create a regular expression which allows for spaces in the text box?

Answer 1

添加可选空格：

var numbers =/^\s*[0-9]+\s*$/; 

Answer 2

Add a space to the character set:

/^[0-9 ]+$/

If you want to guarantee that at least one digit exists, you could use a lookahead:

/^(?=\s*\d)[\d\s]+$/

Answer 3

此正则表达式允许数字和空格。

 /[^\d\s]/

Answer 4

It depends where you want to allow spaces and whether you want input of spaces only (no digits) to be allowed. If you want to require at least one digit and any distribution of spaces, you can do this:

/^(\s*\d+)+\s*$/

This will allow input such as " 202 555 1212 "

Answer 5

This will permit to use spaces, tabs and digits, but require to use at least one digit:

^\s*\d[\d\s]*$

Online fiddle.re demo .