error TS2349: Cannot invoke an expression whose type lacks a call signature
Changing
let labels: string[] | number[] = [];
to either of these
let labels: (string | number)[] = [];let labels: Array<number|string> = [];
will solve the issue.
Changing
let labels: string[] | number[] = [];
to either of these
let labels: (string | number)[] = [];let labels: Array<number|string> = [];
will solve the issue.