Comments (3)
ljharb
commented on May 28, 2024
1
When I overwrite Function.prototype.bind in my current browser with the shim's implementation, new f instanceof b returns true for me. In what browser are you seeing it return false?
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ljharb
commented on May 28, 2024
(Note that it would be incorrect to set it directly; b.prototype !== f.prototype in native)
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LongTengDao
commented on May 28, 2024
<!DOCTYPE html>
<html>
<head>
<title></title>
<script src="./es5-shim.js"></script>
</head>
<body>
<script>
function F () {}
var B = F.bind([]);
var f = new F;
document.write(f instanceof B);
</script>
</body>
</html>IE 6 7 8 all print false.
In current shim, B.prototype is instance of F, in other words, new F and B.prototype are same level instance.
(! ( B.prototype instanceof F ) in native too)
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