What is Angular Data Binding, and how is it implemented?

Web development requires data synchronization between the models and the views. Models fundamentally hold the data values, whereas views deal with what the user sees. Thus, read this post on Angular Data Binding if you want to know how Angular handles this.

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What exactly is Data Binding?

The process that links an application's user interface (UI) to the models is called data binding. The user will be able to control the elements on the website using the browser by using data binding. So, if a variable changes, the Document Object Model, often known as the DOM, must also reflect that change.

Data Binding in Angular establishes the relationship between the components and the DOM. All Angular versions, from AngularJS through the most recent Angular 9 version, include data binding.

Data binding in Angular: Types

Angular supports both one-way and two-way data binding. A simple type of data binding enables you to manipulate the views through the models is called one-way data binding. This implies that changing the Typescript code will also change the supplementary HTML. In Angular, one-way data binding is achieved by:

• String Interpolation vs. Interpolation
• Binding on property
• Binding events

On the other hand, two-way data binding enables data synchronization so that both views and models can be updated. As a result, a component class's template and your application can share information.

Binding of One-Way Data

With one-way data binding, data can only go from the models to the views in one direction. Interpolation, property binding, and event binding are the three ways one-way data binding in Angular can be implemented.

Binding Interpolation

Interpolation binding is employed to produce HTML from TypeScript code, that is, from the components to the views. Between double curly brackets, the template expression is specified in this sentence. Strings can be interpolated into the text that appears between HTML element tags and inside of attribute assignments. 

Output

Between the two curly braces is where the component property is provided. The string value associated with that component property will be substituted for this component property by Angular. It can be utilized in many locations depending on the needs. Interpolation is changed into property binding by Angular. 

Moreover, Angular allows you to modify the interpolation delimiter and substitute a different delimiter for the two curly brackets. The interpolation option in the component information can be used to accomplish this.

Expressions in templates

The two curly braces contain template expressions that result in a value. Angular will execute that expression before being assigned to binding target properties, such as HTML elements, components, or directives.

Property Obligation

Value is transferred from a component's property into the target element's property through property binding. As a result, calling a target element method or reading or pulling data from the target element is not possible with property binding. With event binding, which will be discussed further in this article, the events generated by the element can be acknowledged.

Binding to Events

Using the event binding functionality, you can listen to certain events, such as mouse movements, keystrokes, clicks, etc. In order to implement event binding in Angular, the target event name must be enclosed in regular brackets to the left of an equals sign (=), and the template statement must be enclosed in quotations to the right of the equals sign (=).

An output

Whenever event binding occurs, Angular will set an event handler for the intended event. The handler executes the template statement when that specific event is raised. Receiver statements that carry out activities in response to the event involve receivers. Binding is used to communicate information about the occurrence in this case. Some examples are event string, object, and other data values of the information.

Binary Binding

Data sharing across components and templates are made possible by Angular's support for two-way data binding and the other way around. This guarantees that the models and views of your application are consistently synchronized. Two-way data binding performs two tasks: setting the element property and listening for element change events.

This concludes the section on "Angular Data Binding." I hope you found this to be useful and that it increased your knowledge. However, if you want to further your knowledge and skills, do check out the popular full stack developer course offered by Learnbay.