Angular 18.1: Template Local Variables with @let

#webdev #javascript #angular #frontend

Key takeaways

Syntax: let variableName = expression;
Scope: The variable is only available within the HTML element or block where it's declared.
Common scenarios:
- Reduce repetition of complex expressions.
- Better handle type narrowing.
- Define complex styling options.
- Improve template readability.

Best practices

Use let to minimize repetition.
Use let to improve type narrowing.
Use let to define complex styling options.
Carefully consider using let for calculations or business rules.

Thoughts

The let declaration is a welcome addition that simplifies variable management in templates and improves code readability. It's particularly useful for reducing repetition and defining complex styling options. However, it's important to carefully consider using let for calculations or business rules, as it could make the code harder to maintain.