First of all, I have found several examples relating to my query. But none of them was helpful.
Could you please help me to create a regex which satisfies following 3 conditions:
I believe following regex can be used to validate the 3rd condition: \A(?=\w{9,9}\z)
But I was unable to figure out how to combine multiple conditions.
You can use the following regex:
^(?=[^\r\na-zA-Z]*[a-zA-Z][^\r\na-zA-Z]*)(?=.*[0-9].*).{9}$ Or, if you do not allow anything other than digits and letters:
^(?=[^\r\na-zA-Z]*[a-zA-Z][^\r\na-zA-Z]*)(?=.*[0-9].*)[0-9a-zA-Z]{9}$ Demo.
Explanation:
^ - String start(?=[^\r\na-zA-Z]*[a-zA-Z][^\r\na-zA-Z]*) - Ensure there is only 1 letter in the 9-character string(?=.*[0-9].*) - Ensure that there are digits[0-9a-zA-Z]{9} - The string is 9 characters long (only allowing numbers and characters) (or .{9} - will allow any characters)$ - String endMind that [^\r\n] is added for a more reliable testing on regex101, if you test individual strings (not multiline lists), you can just use ^(?=[^a-zA-Z]*[a-zA-Z][^a-zA-Z]*)(?=.*[0-9].*)[0-9a-zA-Z]{9}$.
function isValidPassword(str) { return /^(?=[^\r\na-zA-Z]*[a-zA-Z][^\r\na-zA-Z]*$)(?=.*[0-9].*$)[0-9a-zA-Z]{9}$/.test(str); } document.getElementById("res").innerHTML = "3445345f3 is " + isValidPassword('3445345f3') + "<br>222222222 is " + isValidPassword("222222222");<div id="res"/>
(?=.*[0-9]) is sufficient