1 00:00:00,450 --> 00:00:07,440 In this video, we are going to learn a very important topic, which is the actual script six requirements 2 00:00:07,740 --> 00:00:16,140 as you know that we have decided to use a script version three one interacting resources from our Node.js 3 00:00:16,140 --> 00:00:17,190 lambda functions. 4 00:00:17,580 --> 00:00:23,550 But before we proceed, we should understand the script six and it is requirements. 5 00:00:24,300 --> 00:00:27,090 Let me start with is the important part. 6 00:00:27,120 --> 00:00:34,380 During the course we will use a basic JavaScript version three and develop our codes ActionScript six 7 00:00:34,380 --> 00:00:35,280 standards. 8 00:00:36,410 --> 00:00:36,950 Yes. 9 00:00:36,950 --> 00:00:45,350 Six blinks, nips and tucks and new features to make our code more modern and readable and do more ES6 10 00:00:45,350 --> 00:00:52,310 requires to use Node.js version 13 or higher, and we have already downloaded the latest versions. 11 00:00:53,630 --> 00:00:56,340 So let's learn the basics of these topics. 12 00:00:56,360 --> 00:01:01,940 First of all, we should understand that there are two types of modal approaches in Node.js. 13 00:01:01,970 --> 00:01:03,660 The first one is the common JS. 14 00:01:03,680 --> 00:01:05,760 Then the second one is the most secure. 15 00:01:05,950 --> 00:01:12,560 Six And in some cases they are using different syntax, for example, import statements. 16 00:01:12,950 --> 00:01:22,400 In the import statements we can use Postscript five with the cost, but six requires the importing statement 17 00:01:22,400 --> 00:01:23,690 with the import keyword. 18 00:01:23,720 --> 00:01:25,880 Let me show you in this documentation. 19 00:01:25,880 --> 00:01:30,320 For example, let's open the API reference documentation of the Dynamo DB. 20 00:01:30,350 --> 00:01:37,010 If you scroll down and come to getting some part in the import statement, you can see the separation 21 00:01:37,010 --> 00:01:37,670 in here. 22 00:01:37,910 --> 00:01:45,440 At most scripts five requires the keyboard and script six, which is the latest version. 23 00:01:45,530 --> 00:01:47,590 It is required the import statement. 24 00:01:47,600 --> 00:01:54,680 If you continue the our slide, this is the first differentiation which is the import and statement 25 00:01:54,680 --> 00:01:59,540 and the second one is the export versus modal exports. 26 00:01:59,540 --> 00:02:06,980 So script six using the export keyword, but the all the versions using the modal exports. 27 00:02:07,490 --> 00:02:15,740 So another differentiate is adding type modal into the package JSON because script using the modularized 28 00:02:15,740 --> 00:02:16,830 package management. 29 00:02:16,850 --> 00:02:20,840 That's why we should provide into package days and type as a module. 30 00:02:20,840 --> 00:02:26,090 So these are the main differences from the script five and six. 31 00:02:26,090 --> 00:02:31,970 So we will use Postscript six also has good documentation about this topic. 32 00:02:32,000 --> 00:02:39,920 If you go to the this article, which is the JavaScript, ES6 and common JS syntax, it is basically 33 00:02:39,920 --> 00:02:46,460 explained how we can use Script six instead of the common JS and what is a syntax differentiation? 34 00:02:46,460 --> 00:02:47,540 Differentiation. 35 00:02:47,540 --> 00:02:48,920 So if you scroll down. 36 00:02:48,950 --> 00:02:55,970 Basically, if we continue the common JS, we should remove the type module information into the package 37 00:02:55,970 --> 00:03:01,250 JSON file and we should compare convert the all import statement to the code statement. 38 00:03:01,250 --> 00:03:07,610 So this is explaining that how we can downgrade the version as a common JS and using the execute five. 39 00:03:07,610 --> 00:03:10,550 But you understand the idea. 40 00:03:10,550 --> 00:03:16,460 If you would like to script six, we should use the import statement and we should add the type module 41 00:03:16,460 --> 00:03:18,400 information into package JSON file. 42 00:03:18,410 --> 00:03:20,780 And here is an example. 43 00:03:20,810 --> 00:03:25,520 There is a exporting module operation with the script six. 44 00:03:25,670 --> 00:03:32,360 It is using export keyword but in common JS execute five it is using module exports. 45 00:03:32,480 --> 00:03:40,490 So if we scroll down and here is the Amazon S3 creating any S3 bucket example with using the Script 46 00:03:40,580 --> 00:03:42,050 six and the common JS. 47 00:03:42,140 --> 00:03:48,230 If you look at the common JS, you can scroll down and see that it is importing the required package 48 00:03:48,230 --> 00:03:54,290 B using the keyword and it is exporting this module as a module that exports. 49 00:03:54,440 --> 00:04:01,640 And if you come back to our e-commerce script six, it is using the import keyword in order to import 50 00:04:01,640 --> 00:04:06,980 required package and it is exporting package with only export keyword. 51 00:04:07,010 --> 00:04:13,310 These are the main differences with using the common JS and the module script six. 52 00:04:13,610 --> 00:04:23,210 So we will follow these scripts during the course in order to gain this velocity and decrease our package 53 00:04:23,210 --> 00:04:23,810 size. 54 00:04:23,810 --> 00:04:30,170 So if we summarize that, we will use Node.js runtime when developing our lambda functions. 55 00:04:30,470 --> 00:04:37,280 And in lambda function we will interact with existing resources, for example, perform CRUD operations 56 00:04:37,280 --> 00:04:38,390 interacting with Dynamo. 57 00:04:38,390 --> 00:04:38,870 DB. 58 00:04:38,900 --> 00:04:45,230 So in this case we will use a SDK JavaScript version three libraries. 59 00:04:45,500 --> 00:04:52,100 So we will use version three because it has very important advantage about decreasing code size and 60 00:04:52,100 --> 00:04:53,630 modularized structure. 61 00:04:53,660 --> 00:04:57,230 This helps lot performance of Lambda Code start issues. 62 00:04:57,830 --> 00:05:05,360 And lastly, we use six modules when developing our Node.js Lambda functions in order to use latest 63 00:05:05,360 --> 00:05:06,760 modern syntax. 64 00:05:07,100 --> 00:05:15,170 To do that, we will add type module into our package JSON file and we will use import keywords and 65 00:05:15,170 --> 00:05:16,340 export keyword. 66 00:05:16,340 --> 00:05:23,150 When using the Node.js modules, I will share some useful resources into video, just resources about 67 00:05:23,150 --> 00:05:23,990 these topics. 68 00:05:23,990 --> 00:05:26,570 Nevertheless, please don't be overloaded. 69 00:05:26,600 --> 00:05:29,270 These are important but very easy to apply. 70 00:05:29,300 --> 00:05:31,970 We will do everything step by step and together. 71 00:05:32,000 --> 00:05:35,750 You don't miss any point during the course and these are the best. 72 00:05:36,010 --> 00:05:42,070 This is to develop modern lambda functions on a wireless environment that we will follow of these best 73 00:05:42,070 --> 00:05:44,170 practices in the enterprise applications.