I am new to javascript regular expressions.Any-way i want to valiadate a string that matches some conditions
Here are the conditions
1.String contains only 9 characters
2.First two letters must be alphabets.
3.third letter must be '-' this.
4.Remaining 6 letters must be digits
function validateInput(str){
if(str.length>9){
alert("Exeeds maximum limit");
}
}
How can i do the rest of the validations using regex?
The following regex matches exactly what you described:
/^[a-z]{2}-\d{6}$/i
^ matches the start of string (preventing matches in the middle of the string)[a-z]{2} matches 1 letter, repeated 2 times (thus it matches 2 letters).- matches a literal dash\d{6} matches a digit, repeated 6 times (6 digits).$ matches the end of string./i - case-insensitive match. So [a-z] also matches uppercase letters as well.Code
function validateInput(str){
if(/^[a-z]{2}-\d{6}$/i.test(str)){
document.body.innerText += str + "\t- Valid input\n";
} else {
document.body.innerText += str + "\t- Invalid input\n";
}
}
validateInput("xY-123456");
validateInput("abc-12345");Note: using document.body.innerText as a way to output in the Code Snippet, but it shouldn't be used in your code
