Can anyone provide a regex that only allows the characters 0-9, a-z, A-Z, hyphen, question mark, and "/" slash, with a character length between 5 to 15?
I attempted the following approach, but it did not yield the desired result:
var reg3 = /^([a-zA-Z0-9?-]){4,15}+$/;
alert(reg3.test("abcd-"));
Ensure the length falls within the range of 5 to 15.
Is this why you included this?
{4,15}+
Simply use {5,15}; as it is already a quantifier, adding a + after it will not function. The group may not be necessary, but everything should still operate correctly.
/^[a-zA-Z0-9?/-]{5,15}$/
(I also inserted a slash character.)
Here is the solution you've been looking for:
if (/^([a-z\/?-]{4,15})$/i.test(subject)) {
// Match successful
} else {
// Match attempt failed
}
UNDERSTANDING THE REGEX
^([a-z\/?-]{4,15})$
Options: Case insensitive
Start at the beginning of the string «^»
Find and capture a match with the following pattern «([a-z\/?-]{4,15})»
Match any character within this list between 4 to 15 times inclusively «[a-z\/?-]{4,15}»
Characters can include letters from 'a' to 'z', slash '/', question mark '?', or hyphen '-'
Ensure it's the end of the string «$»
There are a couple of issues that need to be addressed.
{5,15} instead of {4,15}+/Your code can be revised as follows:
var reg3 = new RegExp('^[a-z0-9?/-]{5,15}$', 'i'); // The 'i' flag eliminates the need for A-Z
alert(reg3.test("a1?-A7="));
Update
Let's not confuse what can be done with what MUST be done; let's focus on the main point I am trying to convey.
The section {4,15}+ in /^([a-zA-Z0-9?-]){4,15}+$/ should actually be {5,15}, and don't forget to include /; this will make your regular expression:
/^([a-zA-Z0-9?/-]){5,15}$/
which CAN also be written as:
/^[a-z0-9?/-]{5,15}$/i // The 'i' flag eliminates the need for A-Z
I hope everyone is comfortable using the /i flag as well.
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