Skip to main content

AOT compilation

What is AOT compilation
What are the advantages of AOT

Every Angular application consists of components and templates which the browser cannot understand. Therefore, all the Angular applications need to be compiled first before running inside the browser. 

Angular provides two types of compilation: 

  • JIT(Just-in-Time) compilation
  • AOT(Ahead-of-Time) compilation



  • In JIT compilation, the application compiles inside the browser during runtime. 
    Whereas in the AOT compilation, the application compiles during the build time. 

    The advantages of using AOT compilation are: 
  • Since the application compiles before running inside the browser, the browser loads the executable code and renders the application immediately, which leads to faster rendering.
  • In AOT compilation, the compiler sends the external HTML and CSS files along with the application, eliminating separate AJAX requests for those source files, which leads to fewer ajax requests.
  • Developers can detect and handle errors during the building phase, which helps in minimizing errors.
  • The AOT compiler adds HTML and templates into the JS files before they run inside the browser. Due to this, there are no extra HTML files to be read, which provide better security to the application.

  • By default, angular builds and serves the application using JIT compiler:

    ng build 
    ng serve

    For using AOT compiler following changes should be made:

    ng build --aot 
    ng serve --aot

    Comments

    Popular

    Building Block of Angular

    The main building blocks for Angular are modules, components, templates, metadata, data binding, directives, services, and dependency injection. Below mentioned are the main building blocks of an Angular application: - Modules  group components logically within the project. Angular basically is a modular framework where every block of functionality is encapsulated within a module and exposed outside within the project as a service. There are two types of modules one is encapsulating block of function within a single component and the other is encapsulating block of function within single or group of components by providing exposure in a unified manner via an interface. Components  help in controlling UI block and also it provides data and logic. It represents a unique "View" and "View Model" in MVVM pattern or exactly like what Controllers do in Angular 1. The "V...

    HTML Basic

    HTML (Hypertext Markup Language) Basic What is HTML ? HTML invented by Tim Berners-Lee in 1990. HTML stands for hypertext markup language. Web browsers receive HTML documents from a web server or from local storage and render the documents into multimedia web pages .We can create web page with different elements like audio, video, image, tables, link, list & text etc, with CSS & JavaScript. version of HTML There are 6 version of HTML HTML Version Year HTML 1991 HTML 2.0 1995 HTML 3.2 1997 HTML 4.01 1999 XHTML 2000 HTML 5 2014 (Latest version) Latest version of HTML Latest version of html is HTML 5.0 , in latest version of html provided new tags for multimedia support. Now we are creating web page  index.html  How we can create Web page <!DOCTYPE html> < html > < head > < title > This is my First Web Page </ title > </ head > < body > < h1 > My First heading ...

    JavaScript Closure

    What is closure? It is my personal experience, I have never understood closure, I have read many articles & have seen many videos. Finally, I understood sometimes we even used a closure without realizing we were using a closure. First, understand the meaning of closure “an act or process of closing something”, now we can relate closure in javascript, closure is an inner function which wraps inside the outer function, which can access outer function scope & global function scope. for scoping you can read my previous blog:- http://uisource.blogspot.com/2018/08/javascript-variable-scoping.html why do we create? Global variables can be made local (private) with closures. To avoid the usage of global variables, use the local variables and wrap your code in the closure. A closure is an inner function that has access to the outer (enclosing) function’s variables—scope chain(Lexical scoping). The closure has three scope chains: it has access to its own scope (variables define...