Component template basics in Angular - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of a component template in Angular?

A component template defines the HTML structure and layout that the component will display in the browser. It controls what the user sees and interacts with.

beginner

How do you bind a component's property to display its value in the template?

You use interpolation with double curly braces, like {{ propertyName }}, to show the value of a component's property in the template.

intermediate

What is the role of the @Component decorator's template or templateUrl property?

It tells Angular where to find the HTML template for the component, either inline with template or in a separate file with templateUrl.

intermediate

How can you add a CSS class conditionally in an Angular template?

Use the <code>[class.className]</code> binding with a condition, for example: <code>&lt;div [class.active]="isActive"&gt;</code>. The class is added only if the condition is true.

intermediate

What is the difference between interpolation and property binding in Angular templates?

Interpolation {{ }} is used to display string values inside HTML. Property binding [property] sets DOM element properties and can bind to non-string values like booleans or numbers.

Which syntax is used to display a component's property value in the template?

A (propertyName)

B [propertyName]

C <propertyName>

D {{ propertyName }}

Interpolation uses double curly braces {{ }} to display property values in the template.

Where do you define the HTML structure for an Angular component?

A In the service file

B In the component's TypeScript class

C In the component's template

D In the module file

The component's template defines the HTML structure shown in the browser.

How do you link an external HTML file as a component's template?

A Using template in @Component decorator

B Using templateUrl in @Component decorator

C Using styleUrls in @Component decorator

D Using selector in @Component decorator

templateUrl points to an external HTML file for the component's template.

Which binding syntax adds or removes a CSS class based on a condition?

A [class.className]="condition"

B (class.className)="condition"

C {{ className }}

D [style.className]="condition"

The [class.className] binding adds the class if the condition is true.

What is the main difference between interpolation and property binding?

A Interpolation displays strings; property binding sets DOM properties

B Interpolation sets DOM properties; property binding displays strings

C Both do the same thing

D Interpolation is for events; property binding is for styles

Interpolation is for displaying string values; property binding sets element properties and can handle other data types.

Explain how Angular component templates connect the component's data to what the user sees.

Think about how the component's properties appear on the screen.

Describe how you can conditionally add a CSS class in an Angular template and why this might be useful.

Consider how you might highlight or hide parts of the UI based on data.