LibJS: Explicitly pass a "Function& new_target" to Function::construct

This allows the proxy handler to pass the proper new.target to construct handlers.
Author: https://github.com/mattco98 Commit: bda39ef7ab Pull-request: https://github.com/SerenityOS/serenity/pull/2630 Issue: https://github.com/SerenityOS/serenity/issues/2624 Reviewed-by: https://github.com/awesomekling
2025-05-07 11:42:51 +00:00 · 2020-06-25 15:30:58 -07:00 · 2020-06-25 15:30:58 -07:00 · bda39ef7ab · 2024-07-19 05:18:39 +09:00
commit bda39ef7ab
parent 19411e22d0
38 changed files with 63 additions and 50 deletions
--- a/Libraries/LibJS/Tests/Proxy.handler-construct.js
+++ b/Libraries/LibJS/Tests/Proxy.handler-construct.js
@ -27,6 +27,21 @@ try {
    assert(new p(15).x === 15);
    assert(new p(15, true).x === 30);

+    let p;
+    function theNewTarget() {};
+    const handler = {
+        construct(target, arguments, newTarget) {
+            assert(target === f);
+            assert(newTarget === theNewTarget);
+            if (arguments[1])
+                return Reflect.construct(target, [arguments[0] * 2], newTarget);
+            return Reflect.construct(target, arguments, newTarget);
+        },
+    };
+    p = new Proxy(f, handler);
+
+    Reflect.construct(p, [15], theNewTarget);
+
    // Invariants
    [{}, [], new Proxy({}, {})].forEach(item => {
        assertThrowsError(() => {