Angular2: Can you explain this *ngFor command followed by a function?

Asked Apr 14 '16 at 15:58

Active Apr 14 '16 at 15:58

Viewed 64 times

<p *ngFor="#item of items; trackBy:myTrackBy; #i=index"> 
   {{i}}: {{item}}
</p>

and I am wondering what is

trackBy:myTrackBy?

it's a custom function that gets a param passed? I would have asked on the blog but can't post replies, thus posting here

and code sample of trackBy:myTrackBy would look be GREATLY appreciated

Sean

asked Apr 14 '16 at 15:58

born2net

See also http://stackoverflow.com/questions/33363987/angular2-ngfor-inside-tree-model-wrong-order-when-remove-and-then-add-elements – Mark Rajcok Apr 14 '16 at 16:03
any official docs on this trackBy? – born2net Apr 14 '16 at 17:01
I'm not aware of any documentation. – Mark Rajcok Apr 14 '16 at 17:31
found the best docs: http://www.bennadel.com/blog/3020-understanding-object-identity-with-ngfor-loops-in-angular-2-beta-3.htm – born2net Apr 14 '16 at 19:58

0 Answers0