复杂字符串的Javascript正则表达式

Question

I want to create a regex which will match string like "123;qwe;12324", this regex is working fine:

[a-zA-Z0-9;]

But I want to allow blank spaces also if preceded or followed by ; but this is not working:

[a-zA-Z0-9;\s(?=;)]

Can someone please help.

Answer 1

I guess

/^([a-zA-Z0-9]+\s*;\s*)*[a-zA-Z0-9]+$/

Test

> re.test('abc')
true
> re.test('abc;def')
true
> re.test('abc;  def')
true
> re.test('abc;  def;')
false
> re.test('abc^^^;  def;')
false