Why Migration Is Beneficial Not Only for Development but Also for Business

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Why Migration Is Beneficial Not Only for Development but Also for Business Frontend Migration of a Large-Scale Legacy Application to New Framework or Technology Why migration is beneficial not only for development but also for business, and how to migrate almost any application to a cutting-edge framework Migration of a Large-Scale Legacy Application to New Framework or Technology 2 Businesses Developers Meanwhile, are very sensitive to risks. In their dictionary, are those who often initiate a migration technology moves fast forward sweeping out the risk is something that could prevent them discussion, which makes them look like whole ecosystems of tools and solutions and from earning their profits. self-centered lazy bones. replacing them with new ones. When someone says business people spend They ask to spill out money so that their Adobe Flash, Microsoft Silverlight - there is a huge amount of their profits and add to the work would become more interesting, that's no more need to launch new features in existing risks, usually it seems not a good what business people hear in their products that use them because they are, in idea for them. arguments. fact, dead. This is the reason why migration isn't as Businesses are interested to drive forward Of course, business people know what popular as it might be. their product and add new features; they happens in the technology world and read rarely can examine the risks outside their technical news, however it will be still late to business lane. swap horses in midstream when the decline is obvious. Migration of a Large-Scale LEgacy Application to NEw FramEwork or TEchnology 3 First, every new framework or technology is built to make the development cost simpler, faster, and avoid mistakes, which Migration is potentially can add to the product growth speed and launch. Second, with each new version, the development community incorporates more and more means for testing and ensuring code beneficial not quality to new technologies. It also allows testing more quickly, being flexible and iterating more, testing hypotheses, and mastering your products to their best. only for Building products using state-of-the-art technology means more flexible development. The business doesn’t waste time building some features from scratch, which enables quicker time-to-market developers but and provides advantage over the competition. Also, the time for hiring new developers for projects shortens as usually developers strive to work with the newest technologies for the business available. It indicates also that they are up-to-date with the latest trends in their professional field. In case you’re scaling your project, this point is especially important. overall. Finally, onboarding is also simplified in case you use the latest technologies and frameworks. Migration of a Large-Scale Legacy Application to New Framework or Technology 4 With large-scale applications, the migration question stands more abruptly. Despite it costing considerably more money to migrate huge applications, the costs of inaction for them also rise significantly. Sometimes companies even take investment rounds with a sole purpose to get financing for a migration and save the product from a disaster. It’s your responsibility to grab the moment when it’s not too late to switch from one framework to another and not lose all the budget. switch and don’t lose Migration of a Large-Scale Legacy Application to New Framework or Technology 5 When you know how to migrate from a legacy technology to a new version of it, you usually will be able to successfully finish it with almost every technology or framework as the principles are rather common. Migration of a Large-Scale Legacy Application to NeW FrameWork or Technology 6 Since the announcement that If your company is deciding to AngularJS 1.7 version has been migrate and take advantage of the finalized, many teams have faced a Angular’s cutting-edge development conundrum: Should they migrate to approach, enhanced performance, the latest Angular version? Often and scalability, the following is a FinTech companies have complex step-by-step guide that illustrates a systems that require a seamless keynote migration case. migration strategy because they need to provide uninterrupted services. Seamless migration from AngularJS to Angular 7 Seamless 01 Introduction 03 Migration as such 9 Why migrate 20 Dual-booting migration 10 Four things to focus on 22 Services, components, routing 23 Downgrade and upgrade strategies 02 Preparing for migration from 04 AngularJS cleanup 12 Angular Style Guide 13 Webpack integration AngularJS 14 Typescript integration Resources 15 AngularJS update to Angular 16 Switching to components syntax Seamless migration from AngularJS to Angular 8 01 IntrodUction Before we start The purpose of this migration is to Before we start the guide, please smoothly integrate both AngularJS and note that Angular refers to the Angular frameworks into one Angular of today and tomorrow; application and migrate in stages to AngularJS is the name for all 1.x keep production up and running. versions of Angular. The first stage is dividing the whole In this guide, we describe how to process into two parts: preparing the migrate an application from code for migration and migrating it. AngularJS 1.x to Angular. Seamless migration from AngularJS to Angular 9 Why migrate AngularJS 1.7 is the last version of the AngularJS Migration is more appropriate for complex intertwined framework. There won’t be any more updates in the projects than writing the app from scratch because future. you only need to change the dependencies, not the business logic. Angular promotes up-to-date coding approaches. Migration is good for your team to practice new skills; Angular has enhanced performance you can observe it improves both the team spirit and professional even during the migration stage. skills. Angular projects are increasingly flexible and scalable Utilizing the latest technology makes it easy to find compared to those in AngularJS. qualified staff because the best people want to work with the latest tech. Migration allows you to optimize your code along with the process. Seamless migration from AngularJS to Angular 10 Four things to focus on Estimates. Testing. Refactoring. Dependencies upgrade. Before migrating, estimate The migration process Migration is high time for The migration will require the time you will need for it requires several regression refactoring the areas you getting rid of the and keep with the time phases. Migrate the way usually won’t get around dependencies; however, frames. The migration will the regression is needed to. Think over the it’s possible to upgrade be followed by lots of as rarely as possible. Also, refactoring plan to those that are compatible refactoring, so there’s a it’s best to migrate the app prioritiZe tasks according with the new framework chance of getting carried in stages so that QAs can to the estimates. version at this stage. away. focus on testing the parts, not the whole system. Seamless migration from AngularJS to Angular 11 02 Preparing for migration At the preparation step, the most important factor is making the code increasingly resemble Angular with each iteration. Seamless migration from AngularJS to Angular 12 Angular Style Guide Following the Angular Style Guide patterns and practices helps Example make an AngularJS app more closely aligned with Angular. The reasons to apply the style guide go beyond the upgrade because Before it takes the codebase to a whole new level. <script src="app/controllers.js "></script > In AngularJS, it’s a widespread bad practice when one file can contain several entities—directories, services, components, and After so on. In Angular, as follows, it’s necessary to redistribute the <script src="app/controllers/person-create.controller.js"></script > code to have one entity per file: <script src="app/controllers/person-list.controller.js"></script > Step 1: Create a folder named for the feature area it represents. <script src="app/controllers/person-edit.controller.js"></script > Step 2: Create a file named controller-name.controller.js <script src="app/controllers/search.controller.js"></script > inside the controllers folder. Step 3: Move each controller code block from the controllers.js file to the newly created dedicated file. Step 5: Rebuild your application. Step 4: Import the newly added controller files into the applicationto the index.html file. Seamless migration from AngularJS to Angular 13 Webpack inteGration To migrate over Angular, a module loader is necessary. Webpack allows using the import and export features that explicitly specify what code can and will be shared between the different parts of the application, and it also makes it easier to package them all up into production bundles with batteries included. Introducing webpack entails considerable syntax changes and deleting previously used loaders such as Gulp, Grunt, and others. Seamless migration from AngularJS to Angular 14 Typescript is a superset of Javascript; therefore, changing any .js file to .ts will work without any problems. Still, some other preparations will make migration more seamless: • TypeScript imports and exports can be used to organize code into modules. Example: src/app/controllers/index.ts Typescript import "./person-create.controller"; import "./person-edit.controller"; import "./person-list.controller"; integration import "./search.controller"; • Type annotations can be added to existing functions and variables. • JavaScript features new to ES2015, such as arrow functions, lets and consts, default function parameters, and destructuring assignments, can also be added. • Services and controllers can be turned into classes. Seamless migration from AngularJS to Angular 15 AngularJS update Before migrating over to Angular, consider upgrading to the latest AngularJS version. • If you use AnguLarJS 1.x-1.4, upgrade to AnguLarJS 1.7. • If you use AnguLarJS 1.5 or Later, stay as you are. To avoid the compatibiLity issues caused by an upgrade, try upgrading versions incrementalLy.
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