javascript regex for string starting with forward slash followed by alphanum chars and no space

Question

需要一个JavaScript正则表达式来验证一个字符串，该字符串应以正斜杠（“/”）开头，后跟不带空格的字母数字字符？

Answer 1

The regex you need is:

/^\/[a-z0-9]+$/i

ie:

• ^ - anchor the start of the string
• \\/ - a literal forward slash, escaped
• [a-z0-9]+ - 1 or more letters or digits. You can also use \\d instead of 0-9
• $ - up to the end of the string
• /i - case independent

Answer 2

This should do it. This takes az and AZ and 0-9.

/^\/[a-z0-9]+$/i

Image from Regexper.com

Answer 3

Try following:

/^\/[\da-z]+$/i.test('/123')    // true
/^\/[\da-z]+$/i.test('/blah')   // true
/^\/[\da-z]+$/i.test('/bl ah')  // false
/^\/[\da-z]+$/i.test('/')       // false