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LibJS: Add global isNaN() function
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2 changed files with 9 additions and 0 deletions
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@ -18,6 +18,11 @@ GlobalObject::GlobalObject()
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this_object->heap().collect_garbage();
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return js_undefined();
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});
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put_native_function("isNaN", [](Object*, Vector<Value> arguments) -> Value {
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if (arguments.size() < 1)
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return js_undefined();
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return Value(arguments[0].is_nan());
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});
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put("Math", heap().allocate<MathObject>());
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}
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@ -3,6 +3,10 @@ function assert(x) { if (!x) throw 1; }
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try {
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var nan = undefined + 1;
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assert(nan + "" == "NaN");
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assert(isNaN(nan) === true);
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assert(isNaN(0) === false);
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assert(isNaN(undefined) === false);
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assert(isNaN(null) === false);
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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