CODEWITHSUNDEEP
angular
jz87
jz87

Reputation: 9617

Expression X changed after it's checked

See https://plnkr.co/edit/7K03F7Orscz0PZdeanNK

export class Filter implements PipeTransform {
    public transform(value: any, args: any[] = []): any {
        return value.filter(() => true); 
        // return value;
    }
}

I'm trying to write a pipe that filters an array. The problem is when I filter the array, the filter function returns a new array and then I get an Expression X changed after it's checked error. I don't get this error only if I mutate the array in place, but this is not what I want to do. Is there anyway of transforming input values using a pipe and not get this error?

Upvotes: 2

Views: 112

Answers (1)

Günter Zöchbauer
Günter Zöchbauer

Reputation: 657118

Cache the result and return the cached result while the passed array or filter arguments didn't change.

Upvotes: 1

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