Need regex for project name with the following conditions

Need regex for the “Project name” with following condition. Expected Result: Take alphabetical, alpha numeric, alpha numeric symbolic Actual Result:

1.    Take alpha – Pass
2.    Take Numeric – Pass
3.    Take Alpha numeric – Pass
4.    Take alpha numeric special characters - Pass
5.    If Only special characters – Fail

that is, Everything is allowed but if it is just special characters and no text than it’s a problem. **Example:

• zjna5726$7&^#bsg //allowed
• %&*% // just special characters not allowed
• I tried /^[ A-Za-z0-9_@./#&+-]*$/ but did not help
• ^([w+d+]+)((-)([w+d+]+))* //did not help it is only excepting one character in between only.

Answer

^(?=[W_]+[a-zA-Z0-9]|[a-zA-Z0-9]+[W_]|[a-zA-Z0-9]+).+$ – This regex should fulfil your requirement.

alpha="abc"
numeric="123456789"
alphaNumeric="Abc1234"
alphaNumericSpcl="#Abc1234$!@~!"
onlySpcl="!@#$%^&*()_-+={}|][:;'".,><?/`"
randomString="!@#$%^&*()_-abde9+={}|][:;'".,><?/`"

regex=/^(?=[W_]+[a-zA-Z0-9]|[a-zA-Z0-9]+[W_]|[a-zA-Z0-9]+).+$/
console.log("Test of Alpha:",regex.test(alpha));
console.log("Test of Numeric:",regex.test(numeric));
console.log("Test of Alphanumeric:",regex.test(alphaNumeric));
console.log("Test of Alphanumeric and Special:",regex.test(alphaNumericSpcl));
console.log("Test of only Special:",regex.test(onlySpcl));
console.log("Test of Random String:",regex.test(randomString));

Output:

Test of Alpha: true
Test of Numeric: true
Test of Alphanumeric: true
Test of Alphanumeric and Special: true
Test of only Special: false
Test of Random String: true