139655 2014-12-15 14:56:27 -0800 Web Inspector: functions and accessors not shown when debugger paused in constructor 2014-12-16 11:16:20 -0800 1 1 1 Unclassified WebKit Web Inspector 528+ (Nightly build) All All RESOLVED DUPLICATE 137306 P2 Normal --- 1 burg webkit-unassigned graouts joepeck timothy webkit-bug-importer oldest_to_newest 1055746 0 burg 2014-12-15 14:56:27 -0800 As I understand it, the new operator creates an empty object, sets the prototype field, then calls the constructor. However, functions from the prototype do not show up in autocomplete or the details sidebar when the debugger pauses within a constructor. Test case: Foo = new function() { this._luckyNumber = 3; debugger; } Foo.prototype = { get luck() { return this._luckyNumber; }, set luck(v) { this._luckyNumber = v; }, toString: function() { return "" + this._luckyNumber; } } var f = new Foo(); f.luck = 4; f.luck; f.toString(); 1055751 1 joepeck 2014-12-15 15:04:23 -0800 > Foo = new function() { > this._luckyNumber = 3; > debugger; > } > > [snip] > > var f = new Foo(); As written, this causes an exception. Since you are doing "Foo = new function" up above and then "new Foo". [Error] TypeError: Object is not a constructor (evaluating 'new Foo()') Things behave as expected when you create the constructor: function Foo() { this._luckyNumber = 3; debugger; } Is there still an issue here? 1055752 2 joepeck 2014-12-15 15:05:50 -0800 (In reply to comment #0) > As I understand it, the new operator creates an empty object, sets the > prototype field, then calls the constructor. However, functions from the > prototype do not show up in autocomplete or the details sidebar when the > debugger pauses within a constructor. > > Test case: > > Foo = new function() { > this._luckyNumber = 3; > debugger; > } > > Foo.prototype = { > get luck() { return this._luckyNumber; }, > set luck(v) { this._luckyNumber = v; }, > toString: function() { return "" + this._luckyNumber; } > } Also, as written the debugger pauses inside the "new function" without having assigned the prototype yet. So the debugger was behaving correctly then. 1055753 3 243313 burg 2014-12-15 15:12:47 -0800 Created attachment 243313 Better test case 1056014 4 joepeck 2014-12-16 11:16:20 -0800 The test case behaves as expected right now, but can be improved. The console autocompletes prototype properties, and expanding this -> proto -> you see luck getter / setters. We are looking to improve the object display (Object Properties tree) in: <https://webkit.org/b/137306> Web Inspector: Expanding event objects in console shows undefined for most values, it should have real values Specifically: https://bugs.webkit.org/show_bug.cgi?id=137306#c3 Lets dup? *** This bug has been marked as a duplicate of bug 137306 *** 243313 2014-12-15 15:12:47 -0800 2014-12-15 15:12:47 -0800 Better test case test.html text/html 628 burg PCFkb2N0eXBlIGh0bWw+CjxodG1sPgo8aGVhZD4KPHNjcmlwdCB0eXBlPSJ0ZXh0L2phdmFzY3Jp cHQiPgpGb28gPSBmdW5jdGlvbigpIHsKICAgIHRoaXMuX2x1Y2t5TnVtYmVyID0gMzsKICAgIGRl YnVnZ2VyOwogICAgLy8gQXQgdGhpcyBwb2ludCwgbmVpdGhlciBzZXQgbHVjaygpLCBnZXQgbHVj aygpLCBvciB0b1N0cmluZyBhcmUgaW4gdGhlIHNpZGViYXIuCiAgICAvLyBgdGhpcy5sdWNrYCB3 aWxsIGF1dG9jb21wbGV0ZSBpbiB0aGUgY29uc29sZSwgYnV0IG5vdCB0aGUgb3RoZXJzLgogICAg Ly8gSG93ZXZlciwgYWxsIHByb3RvdHlwZSBwcm9wZXJ0aWVzIHN1Y2Nlc3NmdWxseSBldmFsdWF0 ZSBpbiBjb25zb2xlLgp9CgpGb28ucHJvdG90eXBlID0gewogICAgZ2V0IGx1Y2soKSB7IHJldHVy biB0aGlzLl9sdWNreU51bWJlcjsgfSwKICAgIHNldCBsdWNrKHYpIHsgdGhpcy5fbHVja3lOdW1i ZXIgPSB2OyB9LAogICAgdG9TdHJpbmc6IGZ1bmN0aW9uKCkgeyByZXR1cm4gIiIgKyB0aGlzLl9s dWNreU51bWJlcjsgfQp9Cgp2YXIgZiA9IG5ldyBGb28oKTsKZi5sdWNrID0gNDsKZi5sdWNrOwpm LnRvU3RyaW5nKCk7Cjwvc2NyaXB0Pgo8L2hlYWQ+Cjxib2R5PgpUZXN0CjwvYm9keT4KPGh0bWw+ Cg==