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Issue #2256 - Implement Object.hasOwn(object, property)

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This is a convenience access function to hasOwnProperty.

Trivial, self-hosted implementation providing the interface to the
already existing hasOwnProperty cpp function with additional toObject
for spec compliance.

Resolves #2256
This commit is contained in:
Moonchild 2023-05-29 22:47:26 +02:00 • committed by roytam1
commit 77bd81595d
2 changed files with 10 additions and 0 deletions
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1
js/src/builtin/Object.cpp
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@ -1240,6 +1240,7 @@ static const JSFunctionSpec object_static_methods[] = {
JS_FN("seal", obj_seal, 1, 0),
JS_FN("isSealed", obj_isSealed, 1, 0),
JS_SELF_HOSTED_FN("fromEntries", "ObjectFromEntries", 1, 0),
JS_SELF_HOSTED_FN("hasOwn", "ObjectHasOwn", 2, 0),
JS_FS_END
};

9
js/src/builtin/Object.js
View file

@ -220,3 +220,12 @@ function ObjectFromEntries(iter) {
return obj;
}
// Proposal https://github.com/tc39/proposal-accessible-object-hasownproperty
// Object.hasOwn (Object, Property)
function ObjectHasOwn(O, P) {
// Step 1.
var obj = ToObject(O);
// Step 2-3.
return callFunction(std_Object_hasOwnProperty, obj, P);
}