CODEWITHSUNDEEP
typescript
AshH
AshH

Reputation: 49

Type 'string[]' is not assignable to type 'string'

When I upgrade from angular 8 to angular 9, I am getting a wired error saying that "Type 'string[]' is not assignable to type 'string'." when I run "npm install", below is the code that is getting this error.

let A = "";
if(error instanceof HttpErrorResponse){
...
}else{
  B.fromError(error).then(errors => {
        A = errors.splice(0, 5).map(function(re) {
            return res.toString();
          });
  console.log(A);
}

Upvotes: 0

Views: 1471

Answers (2)

GirkovArpa
GirkovArpa

Reputation: 4922

On the first line you declare A as an empty string:

let A = "";

Then you try to assign A the value of errors, which is an Array

A = errors.splice(0, 5).map(function(re) {
  return res.toString();
});

You can't do that. Maybe replace the first line with:

let A: any[] = [];

Or replace any with whatever type the elements of errors are supposed to be.

Upvotes: 1

Andrea O.
Andrea O.

Reputation: 139

It sounds odd to declare variable A as a string (initializing it to an empty string) and later in the else statement, you're assigning it a string array.

Upvotes: 1

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