How to find the count of items in an ngFor after the pipes have been applied

angular angular2-directives
ghawkes picture ghawkes · Mar 18, 2016 · Viewed 46.9k times · Source

I have an ngFor creating rows in a table that is both filtered and paged.

<tr *ngFor="#d of data.results | filter:filterText | pagination:resultsPerPage:currentPage">

There is another element on the page that displays the number of records displayed. These elements are initially bound to the data.Results' length.

How do I get the length of the data that is displayed after the filter pipe has been applied so that I can display it correctly. None of the provided local variables in ngFor seem to account for this.

Answer

G&#252;nter Z&#246;chbauer picture Günter Zöchbauer · Mar 18, 2016

One way is to use template variables with @ViewChildren()

<tr #myVar *ngFor="let d of data.results | filter:filterText | pagination:resultsPerPage:currentPage">

@ViewChildren('myVar') createdItems;

ngAfterViewInit() {
  console.log(this.createdItems.toArray().length);
}

Related questions

How to pass object from one component to another in Angular 2?

I have Angular components and first component uses the second one as a directive. They should share the same model object, which is initialized in the first component. How can I pass that model to the second component?

Read More
Angular 2 Scroll to top on Route Change

In my Angular 2 app when I scroll down a page and click the link at the bottom of the page, it does change the route and takes me the next page but it doesn't scroll to the top of the …

Read More
Exception: Can't bind to 'ngFor' since it isn't a known native property

What am I doing wrong? import {bootstrap, Component} from 'angular2/angular2' @Component({ selector: 'conf-talks', template: `<div *ngFor="talk of talks"> {{talk.title}} by {{talk.speaker}} <p>{{talk.description}} </div>` }) class ConfTalks { talks = [ {title: …

Read More