Angular is an excellent platform that allows developers to build applications with the web. This platform has integrated various best practices like dependency injection, declarative templates, and so on for overcoming development challenges. The newly released Angular 7 has some significant upgrades with it. For more information, follow this link. Consider Angular Training to keep your skills updated. With Angular 7, you can create better applications that can benefit businesses. This post tells you 7 Simple Hacks to Supercharge Your Angular 7 App for better performance and speed.
After a few years of the release of Angular, there has been a sharp incline in the no. of websites using this platform. One of the primary reasons for this sharp incline is due to continuous improvement of this platform. With that said, you should know how to develop better applications using the platform.
7 Simple Hacks to Supercharge Your Angular 7 App
Let’s quickly dive into hacks that you can implement right away to develop mind-blowing applications in Angular 7.
1. Boost Events speed
You can find Event handlers in different locations inside an Angular application like component event bindings and DOM. The idea here is to modify the events to make sure that the change in direction will not exceed 17 ms. Not meeting this target can decline the frame rate speed below 60 frames per second.
The example below is an example of a program that could take a longer time to execute, which will eventually degrade the application performance.
In the above example, you can see App Component that reacts to an event along with a List Service. Due to a lengthy and unnecessary hassle created by an algorithm in changing direction, the application will take longer time than anticipated.
By finding these lengthy processes, one can discover efficient algorithm and replace it to improve Application runtime significantly.
2. Reduce Change Detections
The default setting makes Angular application to go through hectic change direction with every single user interaction. However, one excellent feature in Angular 7 is that you are allowed to take total control of processes. It is possible to signal Angular if a component subtree is updated. After that, eliminate it from change detection.
A simple tip to remove a component subtree is by changing the setting from
changeDetection property to
ChangeDetectionStrategy.OnPush. It gives the command to Angular to check the input if and only if the information is modified one way or the other.
By putting an extra effort, you can get more control. Here is one more tip to tell Angular to remove a component from change detection. Just inject the
3. Keep DOM Manipulations Minimum
The standard setting of Angular is that it will automatically make use of object identity for identifying if there are added/removed/rearranged items. If you are writing a lengthy program, Angular will automatically create new DOM collections to render. It will drastically decrease the load time. By making use of
trackBy, it will allow you to resolve this problem.
4. AOT Compilation
By default, Angular uses “Just in Time” compilation. What this means is that Angular will only compile your views when running an application, not before that. It will result in a drastic increase in the load time. As a user of an application, I will not endorse this type of slowness.
The solution to “Just in Time” compilation is AOT (Ahead of Time) compilation. In this step, we compile everything during the time of developing an application. We can now remove Angular compiler (it can reduce the bundle size by ~1mb). Without all the on-time compilation process, your app will load much faster than before. Read this post for more information.
5. Use Lazy Loading Modules to your advantage
The majority of applications that can find on the internet have more than one pages. For instance, they have a profile page, home page, a login interface, and so on. The default setting is to load every single bit of code of all the pages in an application, even if the user never visits the page. It will result in slow load time.
In Angular 7, you have an option to load only codes of the page that users visit. You can do this with the help of the
Before Lazy Loading
After Lazy Loading
6. Remove unnecessary third-party packages
7. Use Server-side rendering
Render the first page of your website as a static page (using Node.js, PHP, .Net) to significantly enhance the perceived performance, speed, and overall user experience. If a visitor quickly sees the first page of your site without any delay, it will immediately put a positive impact on their mind. Angular Universal can help you to do this task without any a headache.
If you want to learn all of Angular, I want to personally recommend ng-book as the single-best resource out there. You can get a copy here.
Your next step is to make changes in your application, according to the hacks that I’ve just revealed to you. One study found that 60% of internet users will be less likely to be loyal to the brand if they have a poor experience with applications and websites.
With an upward trend of the growth of websites, it is likely that the demand for web applications will also increase. Be equipped with enough knowledge and position yourself as a top-notch developer by creating powerful web applications to utilize the growing market of websites and applications.