{\ttfamily includes} method for strings. Resolve native \href{https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes}{\texttt{ includes}} if implemented, otherwise fallback to shim implementation.


\begin{DoxyCode}{0}
\DoxyCodeLine{const includes = require("{}ext/string\_/includes"{});}
\DoxyCodeLine{}
\DoxyCodeLine{includes.call("{}razdwa"{}, "{}raz"{}); // true}
\DoxyCodeLine{includes.call("{}razdwa"{}, "{}trzy"{}); // false }

\end{DoxyCode}
 