Does incorporating a dynamic namespacer for your CSS classes through a component property negatively impact overall performance and loading times?

Picture this:

export class CustomComponent {

  styleNamespace: string;

  constructor(private customStyles: CustomStyles) {
    this.styleNamespace = customStyles.namespace;
  } 
}

And then design your template like so:

<div class="{{styleNamespace}}-container">
  <h1 class="{{styleNamespace}}-main-title"></h1>
  <h2 class="{{styleNamespace}}-sub-title"></h2>
</div>

This approach offers you full control over your styling, minimizing the chances of third-party styles conflicting with yours. However, what about performance? If there are around 20 bindings like this on average per template, could it impact performance enough to reconsider this method?

In theory, performance should not be impacted as it is a one-time binding. But could this potentially increase load time? Without solid testing, it's hard to say for sure.

I am aware of view encapsulation, but I prefer an approach that allows me to disable it without causing any issues.

Is there a more efficient way to achieve this, or is this current method considered effective?

Answer №1

In Angular2, there is no one-time binding feature. Each time change detection is triggered, the properties used in these bindings are evaluated for any modifications.

The change detection mechanism in Angular2 is highly efficient and can be enhanced by utilizing ChangeDetectionStrategy.OnPush.

Having around 20 bindings per template could result in a significant number of total bindings across the application, potentially impacting performance.

However, the impact on load time is not anticipated to be significant.

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