/* * Call the trap with the handler as the this value, the target as the first * argument, and the name of the property as the second argument */ var target = {}; for (var key of ['foo', Symbol('bar')]) { var called; var handler = { has: function (target1, name) { assertEq(this, handler); assertEq(target1, target); assertEq(name, key); called = true; } }; for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy]) { called = false; key in p; assertEq(called, true); } }