正则表达式将字母和数字与 javascript 一起匹配

Question

Html input has to validate the below type of strings. Total length should be 9. and first 3 letters are ABC and it want change. reset of 6 are numbers.

Sample Strings : ABC000123 , ABC000001 , ABC004000

ABC letters not change (Static) and other six numbers should have 0-9 values with leading zeros.

Example : UX143ABC000001 <-wrong

Example : ABC000001 <-correct

My Frist expression : /^(ABC){1}[0-9]{6,6}$/g Second Expression : /^(ABC){1}\\d{6}$/g

$('#smarttag_pp_ex').keyup(function(e) {
     var txt = $(this).val().toUpperCase();
     var txt_ = new RegExp('^ABC[0-9]{6,6}');
        if(txt_.test(txt)) {
             console.log(true);
          }else{
        console.log(false);
     }                
 });

Answer 1

Regex : ^ABC\\d{6}$

If you want to restrict 6th digit being 0 (zero) use: ^ABC(?!0{6})\\d{6}$

Details :

• ^ Asserts position at start of a line
• (?!) Negative Lookahead
• {n} Matches exactly n times
• \\d Matches a digit (equal to [0-9] )
• $ Asserts position at the end of a line

 <form action="#"> <input pattern="^ABC(?!0{6})\\d{6}$" required > <input type="submit" value="submit"/> </form>