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.
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JSTests
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es6
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String.prototype_methods_String.prototype.includes.js
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function
test
()
{
return
typeof
String
.
prototype
.
includes
===
'function'
&&
"foobar"
.
includes
(
"oba"
);
}
if
(!
test
())
throw
new
Error
(
"Test failed"
);