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LibJS: Implement support for the [[IsHTMLDDA]] internal slot

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Best regards from Annex B and document.all :^)
This commit is contained in:
Linus Groh 2021-06-20 17:08:29 +01:00
parent f2aa5efbeb
commit e9388408db
2 changed files with 15 additions and 0 deletions
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12
Userland/Libraries/LibJS/Runtime/Value.cpp
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@ -275,6 +275,9 @@ String Value::typeof() const
case Value::Type::String:
return "string";
case Value::Type::Object:
// B.3.7.3 Changes to the typeof Operator, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-typeof
if (as_object().is_htmldda())
return "undefined";
if (is_function())
return "function";
return "object";
@ -383,6 +386,9 @@ bool Value::to_boolean() const
case Type::BigInt:
return m_value.as_bigint->big_integer() != BIGINT_ZERO;
case Type::Object:
// B.3.7.1 Changes to ToBoolean, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-to-boolean
if (m_value.as_object->is_htmldda())
return false;
return true;
default:
VERIFY_NOT_REACHED();
@ -1329,6 +1335,12 @@ bool abstract_eq(GlobalObject& global_object, Value lhs, Value rhs)
if (lhs.is_nullish() && rhs.is_nullish())
return true;
// B.3.7.2 Changes to IsLooselyEqual, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-aec
if (lhs.is_object() && lhs.as_object().is_htmldda() && rhs.is_nullish())
return true;
if (lhs.is_nullish() && rhs.is_object() && rhs.as_object().is_htmldda())
return true;
if (lhs.is_number() && rhs.is_string())
return abstract_eq(global_object, lhs, rhs.to_number(global_object));