Before start developing an Angular application, we should always have basic information about the use of each part of the application. So, it'll help us to make our Angular application faster and smoother
Component:
A class that interacts with the .html file of the component, to display data on the browser.
Components are denoted by @Component
Metadata:
Metadata is data about the info. It provides information about the aspect/ module and so on.
Template:
Templates combine the Angular markup and HTML tags which may help to modify the data before displaying it on the browser.
Data Binding:
It's a connection or the communication between the HTML element and the Component property. it's used to bind data, events, and property between them.
- One way binding: interpolation is used to create a one-way binding. We try this with the aid of typing double curly braces.
- Property binding: A property may be a data variable of the component, so binding to the property means being notified when the property changes — meaning, from the component to the DOM.
- Attribute binding: Angular's attribute binding helps to set the value of an attribute directly. Attribute binding can be used to improve accessibility, make your application dynamic, and manage multiple CSS classes or styles simultaneously.
- Two-way binding: Two-way binding means changes on one side will impact the other side, and vice-versa.
- Event binding: An event is created by the user. Event binding is from the DOM to the component. It’s also how for the child component to update the parent.
Module:
The module is the place that contains groups of components, directives, pipes, and services, which are associated with the Angular Application. Modules are denoted by @NgModule. Note that when creating a replacement component, you need to import it to the corresponding module file, then add the component to the declarations.
Service:
The most objective of a service is to share business logic, models, or data and functions with different components of an Angular application It contains business logic that may be reusable which means we can write once and use it everywhere on the utility whenever required. Declared as @Injectable.
A template looks like regular HTML, except that it also contains Angular template syntax, which alters the HTML grounded on your operation's sense and the state of operation and DOM data. Your template can use data binding to coordinate the operation and DOM data, pipes to transfigure data before it's displayed, and directives to apply operation sense to what gets displayed.
Dependency Injection:
Dependency Injection may be a design pattern used for providing dependencies to a class from external resources rather than creating them. It's a pattern for handling code dependencies. it's used for Injecting or loading service objects into components.Two main roles exist within the DI system: dependency consumer and dependency provider.
The Injector wont to interact with the dependency consumer and dependency provider. When a dependency is requested, the injector checks its registry to work out if there is an instance already available there. If not, a replacement instance is created and stored in the registry
Directive:
It's used for modifying the DOM elements. declared with @Directive.
Structural Directives:
Basically deals with manipulating the DOM elements. Structural directives have a * (asterisk) before the directive.*ngIf ,*ngFor ,*ngSwitchCase are example of structural directives.
Attribute Directives:
Attribute directives cater to changing the look and behavior of the DOM element. This is frequently where you may create your own directives!
@Input() and @Output() provide a child component with a way to communicate with its parent component. @Input() lets a parent component update data within the child component. Conversely, @Output() lets the kid send data to a parent component.
Pipe:
The most object of the pipe is to transform the data into desired output before displaying it to the browser. You can use pipes to transform strings, currency amounts, dates, and other data for display purposes. Using pipes in template expressions allows you to accept an input value and return a transformed value. Pipes are defined using the pipe “|” symbol, Pipes can be chained with other pipes. Pipes can be handed with arguments by using the colon() sign. Some generally used predefined Angular pipes are
DatePipe Formats a date value.UpperCasePipe Transforms textbook into uppercase.LowerCasePipe Transforms the textbook into lowercase.CurrencyPipe Transforms a number to a currency string.PercentPipe Transforms a number into a chance string.DecimalPipe Transforms a number to a decimal point string
For using an angular application we should always have basic information about the use of each part of the application. This blog demonstrates building blocks of angular like components, metadata, template, data binding, module, services, dependency injection. directives, pipe. At Sanesqaure Technologies, we offer the Best Services for Developing Angular Applications. If you need any help, feel free to contact us.
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