[TypeSript] Definition of input argument `response` in type `TransformResult` is too restrictive

[stonio]

If we try the example given in documentation page Non-standard request / response format in a TypeScript file, we get a TS2339 error:

// Example found in https://github.com/tkirda/jQuery-Autocomplete#non-standard-request--response-format
/// <reference path="../node_modules/devbridge-autocomplete/dist/jquery-plugin.d.ts" />

$('#autocomplete').autocomplete({
    paramName: 'searchString',
    transformResult: function (response ) {
        return {
            suggestions: response.myData.map((item) => ({ // ⚠️TS2339 - Property 'myData' does not exist on type 'string | AutocompleteResponse'. Property 'myData' does not exist on type 'string'.
                value: item.valueField,
                data: item.dataField,
            })),
        };
    },
});

What happened

TypeScript compiler report an error TS2339:

Property 'myData' does not exist on type 'string | AutocompleteResponse'.
Property 'myData' does not exist on type 'string'.

What you expected to happen

TypeScript compiler should accept any type for argument response. Definition of response type in TransformResult is too restrictive.

Versions

• devbridge-autocomplete: 2.0.4
• jquery: 3.7.1
• Browser + OS: all

Autocomplete options

$('#autocomplete').devbridgeAutocomplete({
    paramName: 'searchString',
    transformResult: function (response ) {
        return {
            suggestions: response.myData.map((item) => ({
                value: item.valueField,
                data: item.dataField,
            })),
        };
    },
});

Steps to reproduce

1. Copy the example given in documentation page Non-standard request / response format in a TypeScript file
2. Try compiling this TypeScript file
3. See compiler error