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LibJS: Don't define the "prototype" property for arrow functions

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Jack Karamanian 2020-05-30 00:15:17 -05:00 • committed by Andreas Kling
parent 45ccd9f8d9
commit 1110b1b444
2 changed files with 6 additions and 1 deletions
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3
Libraries/LibJS/Runtime/ScriptFunction.cpp
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@ -61,7 +61,8 @@ ScriptFunction::ScriptFunction(const FlyString& name, const Statement& body, Vec
, m_function_length(m_function_length) , m_function_length(m_function_length)
, m_is_arrow_function(is_arrow_function) , m_is_arrow_function(is_arrow_function)
{ {
define_property("prototype", Object::create_empty(interpreter(), interpreter().global_object()), 0); if (!is_arrow_function)
define_property("prototype", Object::create_empty(interpreter(), interpreter().global_object()), 0);
define_native_property("length", length_getter, nullptr, Attribute::Configurable); define_native_property("length", length_getter, nullptr, Attribute::Configurable);
define_native_property("name", name_getter, nullptr, Attribute::Configurable); define_native_property("name", name_getter, nullptr, Attribute::Configurable);
} }

4
Libraries/LibJS/Tests/arrow-functions.js
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@ -77,6 +77,10 @@ try {
assert(foobar.x.y() === foobar); assert(foobar.x.y() === foobar);
assert(foobar.x.z() === foobar.x); assert(foobar.x.z() === foobar.x);
var Baz = () => {};
assert(Baz.prototype === undefined);
(() => { (() => {
"use strict"; "use strict";
assert(isStrictMode()); assert(isStrictMode());