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LibJS: Add comment clarifying the order of function properties
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@ -76,6 +76,12 @@ void ECMAScriptFunctionObject::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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Base::initialize(global_object);
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// Note: The ordering of these properties must be: length, name, prototype which is the order
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// they are defined in the spec: https://tc39.es/ecma262/#sec-function-instances .
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// This is observable through something like: https://tc39.es/ecma262/#sec-ordinaryownpropertykeys
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// which must give the properties in chronological order which in this case is the order they
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// are defined in the spec.
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MUST(define_property_or_throw(vm.names.length, { .value = Value(m_function_length), .writable = false, .enumerable = false, .configurable = true }));
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MUST(define_property_or_throw(vm.names.name, { .value = js_string(vm, m_name.is_null() ? "" : m_name), .writable = false, .enumerable = false, .configurable = true }));
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