Why Choose ng-bind Over {{}} Interpolation in AngularJS?

Why is ng-bind Better than {{}} in AngularJS?

One presenter shared insights into the advantages of using ng-bind over {{}} interpolation in AngularJS, citing performance and visibility benefits. Let's elaborate on these points:

Visibility:

Unlike {{}} expressions, ng-bind employs ng-cloak, ensuring that placeholder brackets remain hidden until the application fully loads. This makes for a cleaner user experience.

Performance:

{{}} interpolation performs a costly dirty check on every $digest cycle, updating the bound value even if it remains unchanged. In contrast, ng-bind places a watcher on the bound variable, triggering updates only when the value actually changes. This results in significant performance improvements, especially in applications with numerous bindings.

Recommendation:

For optimal performance and visibility, it's recommended to use ng-bind instead of {{}} whenever possible. Directives like ng-bind offer greater control over updates and enhance user experience.

For translation functionality, consider directives over bracket annotations, as directives perform better. Similarly, if you require filtering, opt for directives that utilize custom filters.

Update (November 28, 2014):

Angular 1.3x introduced bindonce, allowing one-time binding of expressions. This is helpful when the bound value is unlikely to change, minimizing unnecessary updates and improving performance.

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