Templates in Angular

Last updated 29-07-23 03:07


In the world of web development, efficiency and maintainability are key factors. Angular, a popular front-end framework, provides a robust templating system that allows developers to create dynamic and reusable user interfaces. In this article, we will explore the concept of templates in Angular, understand their structure, and learn how to leverage their power to build impressive web applications.

What are Templates in Angular?

In Angular, templates are an essential part of the user interface. They define how the application's data should be presented and interacted with by the user. Angular templates use HTML markup and include special syntax and directives that enable dynamic content rendering and data binding.

Creating a Basic Angular Template

Let's start by creating a basic Angular template. Templates in Angular are usually associated with components. A component represents a part of the user interface and is defined using TypeScript. The corresponding template contains the HTML markup for that component.


Welcome to My Angular App

{{ message }}

In this example, we have a simple template with an component and a

element that displays a message and a button.

Directives and Data Binding in Templates

Angular templates leverage directives, such as ngIf, ngFor, and ngClass, to enable conditional rendering, looping, and dynamic styling. Data binding is another powerful feature that allows us to bind the application's data to the template elements.

Welcome, {{ username }}!

  • {{ item.name }}

In this snippet, we use ngIf to conditionally display a welcome message, ngFor to iterate over a list of items, and ngClass to apply different styles based on the isActive variable.

Conditional Rendering and Loops

Templates in Angular provide powerful tools for handling conditional rendering and loops. The ngIf directive allows us to show or hide elements based on a condition, while the ngFor directive facilitates iterating over arrays or collections.

Welcome, {{ username }}!

  • {{ item.name }}

Here, if the user is logged in, the welcome message will be displayed, and the list of items will be dynamically generated using the ngFor directive.

Styling Angular Templates

Styling Angular templates can be achieved using traditional CSS or through Angular's powerful ngStyle and ngClass directives. The ngStyle directive allows you to apply inline styles dynamically, while the ngClass directive enables conditional application of CSS classes.

Styling Angular Templates

In this example, the style of the

element will change dynamically based on the values of textColor and bgColor. Additionally, the classes "active" and "highlight" will be applied conditionally depending on the values of isActive and isHighlighted.

Template Reference Variables

Template reference variables allow us to access elements and components in the template directly from the code.


In this example, the #nameInput reference variable gives us access to the input element's value when the button is clicked, allowing us to greet the user by name.

Template-driven Forms

Angular provides support for template-driven forms, where form controls are defined directly in the template.

Here, we use ngForm to create the form and ngModel to bind the form controls to the component's properties.

Template Best Practices

To ensure maintainable and scalable code, it's essential to follow some best practices when working with Angular templates.

  1. Keep templates concise and focused on their specific components.
  2. Use meaningful names for template elements and variables.
  3. Avoid complex logic in templates; move it to the component.
  4. Leverage Angular's built-in directives for common tasks.
  5. Optimize template rendering by using ChangeDetectionStrategy.OnPush.

Angular Template Security

Angular templates offer built-in protections against Cross-Site Scripting (XSS) attacks. By sanitizing user inputs and using property binding instead of string interpolation, Angular helps prevent malicious scripts from being executed.

Angular Template Performance

Efficient template rendering is crucial for the overall performance of an Angular application. Follow these tips to enhance template performance:

  1. Minimize the use of *ngFor on large datasets.
  2. Lazy-load templates for better initial loading times.
  3. Use trackBy function to improve *ngFor performance.
  4. Utilize Angular's Change Detection mechanism wisely.


Templates are a cornerstone of Angular development, offering a powerful and flexible way to create dynamic user interfaces. By harnessing the features of Angular templates, developers can build maintainable, secure, and high-performing web applications. So, dive into the world of Angular templates and take your web development skills to the next level.


What are the advantages of using Angular templates?

Angular templates provide a structured and declarative way to define the user interface, making it easier to manage and maintain complex web applications. They also facilitate data binding, conditional rendering, and loops, enhancing the overall user experience.

Can I reuse templates in Angular?

Yes, Angular encourages template reuse through components. By creating reusable components, you can leverage the same template across multiple parts of your application, promoting code reusability and modularity.

How do template-driven forms work in Angular?

Template-driven forms in Angular allow developers to define forms directly in the template. The ngModel directive is used to bind form controls to the component's properties, making it easy to handle user inputs and form validations.

Are Angular templates secure against XSS attacks?

Yes, Angular templates come with built-in security measures to protect against Cross-Site Scripting (XSS) attacks. By sanitizing user inputs and using property binding instead of string interpolation, Angular prevents the execution of malicious scripts.

How can I improve the performance of my Angular templates?

To optimize Angular template performance, avoid excessive use of *ngFor on large datasets, lazy-load templates when possible, and use the trackBy function with *ngFor to improve rendering performance. Additionally, making efficient use of Angular's Change Detection mechanism can enhance overall performance.

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