WEBVTT 00:03.870 --> 00:04.320 No. 00:04.320 --> 00:10.470 Geez, errors are really, really powerful and I honestly don't see too much of the need to customize 00:10.470 --> 00:11.660 this module itself. 00:11.670 --> 00:16.440 So notice here you can see that there is a new error and you can simply just come up here and raise 00:16.440 --> 00:16.860 the message. 00:16.860 --> 00:21.570 So all you got to do whenever you need to send an error response as a message, just like we have been 00:21.570 --> 00:22.140 saying. 00:22.140 --> 00:24.510 Resident Send you simply go ahead and say. 00:24.510 --> 00:28.830 Resident Send inside that you just come up here and say, Hey, just construct a new error. 00:28.830 --> 00:29.430 That's it. 00:29.430 --> 00:30.390 That's all you got to do. 00:30.390 --> 00:34.260 And you will see that sometimes we'll be sending the error messages when let's just say we didn't find 00:34.260 --> 00:40.740 the user inside our database or something, we'll be sending these messages and it is perfectly 100% 00:40.740 --> 00:45.930 okay to just go ahead and say that, hey, I want to use this default new error message, but I've seen 00:45.930 --> 00:48.480 people actually overcomplicating this stuff. 00:48.480 --> 00:53.340 I'll show you how they do it and how we can keep it actually bare minimum there so that, you know, 00:53.340 --> 00:58.170 okay, I can go ahead and create these customize error messages or customize error handlers as well. 00:58.200 --> 01:02.100 But my recommendation is you shouldn't be doing that, at least not too much. 01:02.100 --> 01:03.840 So let me go ahead and bring it up to you. 01:04.320 --> 01:08.760 So how we're going to be working with that now, this is going to be our very first utility that we 01:08.760 --> 01:09.630 are going to go ahead and. 01:09.630 --> 01:14.790 Right, so open this up new file and let's call this one as simply a custom error. 01:15.660 --> 01:15.860 Jeez. 01:15.990 --> 01:16.690 Of course. 01:16.710 --> 01:17.490 There we go. 01:17.520 --> 01:22.560 Now in here, we want to go ahead and simply create a class what this class is going to be called as. 01:22.560 --> 01:26.280 So we're going to call this one as custom header just to look fancy. 01:26.280 --> 01:27.780 You don't need to create that. 01:27.780 --> 01:31.380 And this obviously is going to go ahead and extend what class. 01:31.380 --> 01:33.870 We're going to extend the classic error class. 01:33.870 --> 01:37.320 So you obviously need to study it a little bit more in case you want to go with that. 01:37.590 --> 01:41.580 And I have seen in some of the application that this is how they work on. 01:41.580 --> 01:47.390 And finally after that, they go ahead and say, hey, module exports and equals errors. 01:47.400 --> 01:49.050 That's it, that's it. 01:49.050 --> 01:52.770 I have seen this class to be totally empty, no functionality, nothing. 01:52.770 --> 01:55.260 But they don't want to use the classic error class. 01:55.260 --> 01:57.120 They want to use own their customer. 01:57.120 --> 02:01.260 So this is kind of a thing that I've seen in many of the production code even as well. 02:01.380 --> 02:04.620 Now further down the road, you can do in case you want to truly customize. 02:04.620 --> 02:06.660 This is by default. 02:06.660 --> 02:09.390 This class actually takes just one thing, which is a message. 02:09.390 --> 02:14.700 Now you can kind of redefine the constructor in this class that instead of calling new error, you call 02:14.700 --> 02:21.150 new customer and it accepts error message error code, probably something more of the definitions that 02:21.150 --> 02:23.460 you want to give it to that so you can go ahead and do that. 02:23.460 --> 02:27.960 All we got to do for that is create another constructor, kind of overriding the existing constructor. 02:28.110 --> 02:31.290 So there constructor the error, just take the message. 02:31.290 --> 02:32.880 So we will take that as well. 02:32.880 --> 02:34.170 We don't want to change that. 02:34.170 --> 02:38.190 And you can go ahead and you can go ahead and say, hey, I want to accept the code as well. 02:38.190 --> 02:38.850 That's it. 02:38.850 --> 02:41.070 And this code is rather a status code. 02:41.070 --> 02:43.170 So just go ahead and provide me that as well. 02:43.170 --> 02:47.100 Further down the road, you're going to go ahead and say, hey, I want to use the functionality which 02:47.100 --> 02:50.880 is built in, so I'll use the super keyword and I'll just pass on the message as it is. 02:50.880 --> 02:55.050 But further down the road, I'm going to go ahead and say, Hey, I'm creating a new property which 02:55.050 --> 02:58.290 is going to be filled up by the code that you are giving to me. 02:58.290 --> 02:58.890 So that's it. 02:58.890 --> 03:00.030 That's basically it. 03:00.150 --> 03:06.450 Now, whenever you want to use this one, this error message, since this is kind of a super or a parent 03:06.450 --> 03:10.800 of this error, this will definitely display as it is how they were displaying the message, but now 03:10.800 --> 03:12.330 they will display the code as well. 03:12.540 --> 03:13.830 That's basically it. 03:13.860 --> 03:19.290 Again, I don't see a point of doing this because already you can you have the option of raising the 03:19.290 --> 03:20.340 status inside. 03:20.340 --> 03:21.720 Whenever you send the request. 03:21.720 --> 03:24.630 You can also go ahead and use this error and message. 03:24.840 --> 03:29.850 But this is like a little bit of an overkill that I see a lot of places that that is exactly why I wanted 03:29.850 --> 03:31.200 to bring this to your attention. 03:31.230 --> 03:35.940 I will show you that how you can use this custom error as well as just the regular error class itself. 03:35.940 --> 03:39.690 And we will be deliberately creating some of these errors and working through with that. 03:39.690 --> 03:40.860 So that's basically it. 03:40.860 --> 03:43.260 That's exactly how you handle customer errors. 03:43.260 --> 03:45.750 And again, there are a lot more properties going up here. 03:45.780 --> 03:49.680 Maybe stack, trace, maybe you want to go with the error code itself. 03:49.680 --> 03:50.910 So this is exactly what we have. 03:51.270 --> 03:55.680 We have got an error code, we have got error message error stack. 03:55.680 --> 03:58.170 There is a whole lot you want to overwrite any of them. 03:58.170 --> 04:00.150 Go ahead, be my guest and do that. 04:00.150 --> 04:02.550 But at least not till the code is finished up. 04:02.550 --> 04:07.140 So this is basically your customized error handling in the Node.js personal recommendation. 04:07.140 --> 04:08.430 You go with the classic error. 04:08.430 --> 04:10.500 Let's go ahead and catch up in the next video.