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LibJS: Add Array.isArray()

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This commit is contained in:
Linus Groh
2020-05-08 16:28:35 +01:00
committed by Andreas Kling
parent 01fd6ce045
commit ca22476d9d
3 changed files with 42 additions and 0 deletions
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12
Libraries/LibJS/Runtime/ArrayConstructor.cpp
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@@ -41,6 +41,9 @@ ArrayConstructor::ArrayConstructor()
{
put("prototype", interpreter().global_object().array_prototype(), 0);
put("length", Value(1), Attribute::Configurable);
u8 attr = Attribute::Writable | Attribute::Configurable;
put_native_function("isArray", is_array, 1, attr);
}
ArrayConstructor::~ArrayConstructor()
@@ -74,4 +77,13 @@ Value ArrayConstructor::construct(Interpreter& interpreter)
return call(interpreter);
}
Value ArrayConstructor::is_array(Interpreter& interpreter)
{
auto value = interpreter.argument(0);
if (!value.is_array())
return Value(false);
// Exclude TypedArray and similar
return Value(StringView(value.as_object().class_name()) == "Array");
}
}