I am trying match my String to not allow the case: for example 150x150 from the image name below:
test-string-150x150.png
I am using the following pattern to match this String:
/^([^0-9x0-9]+)\..+/
It works fine, Except in such a case:
teststring.com-150x150.jpg
What i need to get - the mask must disallow only dimensions in the end of string, here is some examples:
test-string-150x150.png > must disallow
any-string.png > allow
200x200-test.png > allow
1x1.png-100x100.jpg > disallow
You could use a negative lookahead to assert that the string does not contain the sizes followed by a dot and 1+ word characters till the end of the string.
^(?!.*\d+x\d+\.\w+$).+$
Explanation
^ Start of string(?! Negative lookahead, assert what is on the right is not
.* Match 0+ occurrences of any char except a newline\d+x\d+ Match the sizes format, where \d+ means 1 or more digits\.\w+$ Match a dot, 1+ word characters and assert the end of the string $) Close lookahead.+ Match 1+ occurrences of any char except a newline$ End of string