Mastering ng-template in Angular: Passing Data with Type Safety

In Angular, ng-template is an incredibly powerful tool that lets you create reusable, dynamic, and efficient templates. But what truly sets it apart is the ability to pass data into these templates with full type safety, enabling clean, maintainable code.

In this article, we’ll explore how to pass data to ng-template, enforce type safety, and even use templates in custom components. By the end, you’ll be equipped with the knowledge to supercharge your Angular applications.

What is ng-template?

An ng-template in Angular is used to define template fragments that are not rendered directly in the DOM. Instead, these templates serve as blueprints, which can be instantiated and rendered dynamically when needed.

<ng-template>
  <!-- Your template content -->
</ng-template>

But its real power lies in how you can pass data into it dynamically using ngTemplateOutlet and ngTemplateOutletContext.

Passing Data to ng-template

You can pass data to an ng-template using the ngTemplateOutletContext property. Here’s a practical example:

Example: Passing and Using Data

<ng-template #myTemplate let-name let-age="age">
  <div>
    Name: {{ name }}, Age: {{…