I have been working on Angular 5 project and I was trying run npm build -prod
with AOT as defult one. After compiling error pop up as
Property 'indx' does not exist on type 'EntryComponent'
Can any on point out the mistake. Or it some thing else.
<div *ngFor="let form of getEntryGroupItemsControl(); let indx = index; trackBy: indx">
The reason is the wrong syntax. trackBy
should point to a function, not to an index from the loop. So it should by something like this:
<div *ngFor="let form of getEntryGroupItemsControl(); let indx = index; trackBy: trackByFn">
And in TS file for example:
trackByFn(index, item) {
return item.id;
}
For reference see: 1) https://angular.io/api/common/NgForOf 2) https://angular.io/api/core/TrackByFunction
And here`s an example from official Angular tutorial: https://angular.io/guide/template-syntax#ngfor-with-trackby
I had the same problem. I fixed it using "index as i".
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