https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substr

.substr seems to be deprecated? And never been intended to be part of EcmaScript?
 

-----Ursprüngliche Nachricht-----
Von: Zhihao Yuan <zy@miator.net>

As a prior art, JavaScript String provides both .substr and

.substring methods, where the prior accepts (start, count)

and the latter accepts (start, end).