When calling UIComponent.getRouterFor, a TypeScript error is displayed indicating the unsafe return of a value typed as 'any'

I have recently integrated TypeScript into my SAPUI5 project and am encountering issues with the ESLint messages related to types.

Consider this simple example:

In this snippet of code, I am getting an error message saying "Unsafe return of an any typed value," but I cannot seem to identify the reason behind it. All elements in this function are properly typed. The documentation for UIComponent.getRouterFor from the package @sapui5/ts-types-esm provides the following description:

Could someone please help me understand what mistake I may be making? Are the types correctly defined?

javascripttypescriptvisual-studio-codesapui5

Answer №1

What versions of UI5 types and ESLint are you currently utilizing? While coding in my BaseController, I encountered a different issue: 

@typescript-eslint/no-unnecessary-type-assertion

public getRouter(this: BaseController) {
    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
    return UIComponent.getRouterFor(this) as Router;
}

This code will be automatically modified to:

public getRouter(this: BaseController) {
    return UIComponent.getRouterFor(this);
}

Thanks to type inference, there should be no need for casting.

By the way, I am using ESLint version 8.17.0 and OpenUI5 version 1.102.1 in my case.

Answer №2

When utilizing the getRouterFor() method which already has a specified type, TypeScript will automatically infer the type for you. You might consider implementing something similar to the following:

public obtainRouter(this: BaseController) : Router {
 return UIComponent.getRouterFor(this) 
}

Answer №3

After some investigation, it was discovered that the issues with linting were caused by the VSCode ESlint Extension.

Our project structure for the CAP project includes folders for CDS development in TypeScript and another folder for app resources, which led to confusion for the extension.

We have two .eslintrc.json files - one at the root level (marked with root:true) and another for the TypeScript UI5 app.

To resolve this, I adjusted the working directories settings of the extension as follows:

"eslint.workingDirectories": ["./app", "./srv", "./db"],

With these changes, everything is now functioning correctly.

A special thanks to @Peter Muessig for providing valuable insights.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

HTML5 Video Frozen in Place on Screen's Edge

I am encountering a problem specifically on Webkit, particularly in web view on iOS. When I tested it on desktop Chrome, the issue did not appear. Here is the Portrait image and Here is the Landscape image The video seems to be fixed in one position rega ...

javascriptcsscordovawkwebviewp5.js

What are the common issues with Angular 2's ng-if directive?

I am completely new to working with Angular and have already gone through all the ng-if related questions without finding a solution that fits my issue. Here is my code: <tr *ngFor="#position of positions"> <td> ...

javascriptangularangular-ng-if

I am utilizing Vuex to store all of the product details and handle API request queries efficiently

Question regarding Vue/Vuex efficiency and best practices. I am working with an API that returns a paginated data-set of 50 products, which I am storing in a Vuex store. When displaying all products, I iterate over the Vuex store. Now, for individual pr ...

javascriptrestvue.jsvuejs2vuex

Receiving intelligent suggestions for TypeScript interfaces declared within function parameters

Here is a simple example I put together: In this example, intellisense provides suggestions for the interface of the object named test in the foo function. It works perfectly and I love it! However, if you declare that interface somewhere else like this: ...

typescriptvisual-studio-codeintellisensetypescript2.0

When the class changes, V-for re-renders every component

Currently, I am in the process of changing classes for images based on their index using the moveIndex method and key events. While this works smoothly on computers, it seems to take significantly longer when implemented on TVs. The process runs smoothly w ...

javascripthtmlarraysperformancevue.js

Incorporating external API information into Google Maps

My current challenge involves creating a polygon on Google Maps using data obtained from an external API found at . Upon analyzing the API response, the following information is provided: { "id": 28, "name": "Local spots", "description": "", "isprivate": ...

javascriptjqueryajaxgoogle-mapsgoogle-maps-api-3

What is the best way to display and conceal various elements with each individual click?

Utilizing the onClick function for each triggering element, I have implemented a show/hide feature for multiple element IDs upon click. The default setting is to hide the show/hide elements using CSS display property, except for the initial 3 main elements ...

javascriptjquerycssshow-hide

Create a distributive and an NPM package using one source code

Creating small open source tools is a passion of mine, and I strive to provide the best experience for my users. My packages usually consist of just one function, so here's what I aim to offer: A JavaScript file that users can easily add by including ...

javascriptnpmwebpackgulppackage

Is there a way for me to view the properties within the subcomponents?

Working on a project to create a bulletin board using React, following the official documentation. Decided to consolidate all actions related to the bulletin board into one alert component called AlertC. In the Form onSubmit statement, if the title is tr ...

javascriptreactjs

Typescript fetch implementation

I've been researching how to create a TypeScript wrapper for type-safe fetch calls, and I came across a helpful forum thread from 2016. However, despite attempting the suggestions provided in that thread, I am still encountering issues with my code. ...

typescriptgenericsfetch

Using a foolproof method to accurately track views on stored static pages

I'm trying to find a way to accurately count pageviews on cached pages asynchronously. Due to high traffic, I am generating static HTML pages that are served directly by the web server without requiring PHP or database connections. The issue lies in ...

javascriptphpajaxcaching

Error in React-router: Unable to assign value to the 'props' property as it is undefined

Currently, I am working on setting up routing with Meteor using the react-router package. However, I have encountered a specific TypeError: Here is a link to an image that provides more context: This is the code snippet from my main.js file: import Reac ...

javascriptmeteorreactjsreact-router

Passing props from pages to components in NextJS: A guide

My nextjs-application has a unique folder structure: components -- layouts --- header.tsx --- index.tsx pages -- index.tsx -- [slug].tsx In the [slug].tsx file, I utilize graphql to fetch data and set the props accordingly: export default ...

javascriptreactjstypescriptnext.js

The React Hook useEffect is missing a dependency: 'handleLogout'. Make sure to either add it to the dependency array or remove it from the useEffect hook

import { useState, useEffect } from "react"; import LoginModal from "./LoginModal"; import { NavLink, useLocation, useNavigate } from "react-router-dom"; import { useDispatch } from "react-redux"; import { userLogout ...

javascriptreactjsreact-hooksuse-effectredux-toolkit

What is the process of exporting a module that has been imported in ES6?

Here are 3 code snippets: // ./src/index.ts const myApp = { test: 1, ... } export default myApp // ./src/app.ts import myApp from './src/index' export default myApp // ./index.vue import { example } from './src/app.ts' console.l ...

javascriptvue.jsecmascript-6vite

An issue has been encountered in the code during the installation of react.js

node:internal/modules/cjs/loader:1148 throw err; ^ Error: Module 'C:\Users\hp\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js' could not be found. at Module._resolveFilename (node:internal ...

javascriptreactjsnode.jsnpmnode-modules

Notification for background processing of $http requests

I am searching for a solution to encapsulate all my AJAX requests using $http with the capability to display a loading gif image during processing. I want this functionality to extend beyond just $http requests, to cover other background processing tasks a ...

javascriptangularjsajaxangularjs-service

Reboot JavaScript once a day for optimal performance

Is it possible for the JavaScript's ?random to be based on the current date so that it only loads once a day? <script type="text/javascript" src="http://external.example.com/bookmarklet.js?random"></script> I am asking this question beca ...

javascriptoptimizationbrowser-cache

What is the significance of including the *dispatch* variable in the *dependency array* for the useEffect function?

While reviewing the source code of a ReactJS project, I noticed that the dispatch variable is included in the dependency array of the useEffect hook. Typically, I'm familiar with including useState() variables in this context, so I am curious about th ...

javascriptreactjsreduxreact-redux

Extract a string value from a TypeScript enum

Here is a basic enum definition: export enum Type { TEST_ONE = "testing.one", TEST_TWO = "testing.two", BETA = "beta.one" } I am looking to run a function for each string value in the enum. For example: executeType(type: string) { console.lo ...

typescriptenums