suffix()Always ensures that a string ends with a specific substring.
This function is valid in v2.0.0 to v2.24.3. This function has been downloaded 65 times.undefined or null will cause a partial function to be returned.str if it needs to be added.strSuffix will be appended to the end of it.str is not given a partial function will be returned which will await the string value of str. If opt_rgxTester isn't given, the str will be returned and it will be suffixed with strSuffix if it isn't already at the end of it. If opt_rgxTester is given and str tests negative against it str suffixed with strSuffix will be returned. Otherwise str will be returned.