'React Native TypeSrcript Function Returning JSX.Element Type
I've got a TypeScript function which returns a React Native View.
import React from "react";
import JSX, {View} from "react-native";
class DummyClass {
static getView() {
return (
<View style={{flex: 1}}/>
);
}
}
export default DummyClass;
And I'm calling this function in this way:
import JSX from "react-native";
import DummyClass from "./util/dummy";
const DummyWrapper = () => {
return (DummyClass.getView());
};
export default DummyWrapper;
And when I run eslint, I get a warning.
5:5 warning Missing return type on function @typescript-eslint/explicit-module-boundary-types
So, I need to be returning something. JSX.Element seems reasonable enough, but that doesn't seem to be working. For one, when I try to return a JSX.Element, VSCode can't resolve it and pretends it's any instead. And moreover, it causes errors in other places that call the function.
So, doing this:
static getView() : JSX.Element {
and const DummyWrapper = () : JSX.Element => {
Results in the following error in DummyCaller:
5:5 error Unsafe return of an any typed value @typescript-eslint/no-unsafe-return
So now I'm not sure exactly what to do. I've tried a few other things, such as returning View, typeof View, React.Component (and typeof), and a few other things. I've also messed around with where JSX is being imported from. If I import from react, it seems to work even worse than if I import it from react-native. Also in my research, I see the most common problem is that one's React and React Native types are out of date, but as far as I can tell, I'm on the most up-to-date versions.
My packages.json:
{
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"start": "expo start",
"android": "expo start --android",
"ios": "expo start --ios",
"web": "expo start --web",
"eject": "expo eject",
"lint": "eslint -c .eslintrc.js --ext .tsx ."
},
"dependencies": {
"@dudigital/react-native-zoomable-view": "^1.0.15",
"@react-native-community/masked-view": "^0.1.10",
"@react-navigation/native": "^5.7.6",
"@react-navigation/stack": "^5.9.3",
"@types/react-native-vector-icons": "^6.4.6",
"change-case": "^4.1.1",
"expo": "~39.0.2",
"expo-status-bar": "~1.0.2",
"react": "16.13.1",
"react-dom": "16.13.1",
"react-native": "https://github.com/expo/react-native/archive/sdk-39.0.2.tar.gz",
"react-native-gesture-handler": "^1.8.0",
"react-native-paper": "^4.2.0",
"react-native-reanimated": "^1.13.1",
"react-native-safe-area-context": "^3.1.8",
"react-native-screens": "^2.11.0",
"react-native-tab-view": "^2.15.2",
"react-native-vector-icons": "^7.1.0",
"react-native-web": "^0.13.18"
},
"devDependencies": {
"@babel/core": "~7.9.0",
"@types/jest": "^26.0.15",
"@types/react": "^16.9.53",
"@types/react-dom": "^16.9.8",
"@types/react-native": "^0.63.27",
"@types/react-navigation": "^3.4.0",
"@types/react-redux": "^7.1.9",
"@types/react-test-renderer": "^16.9.3",
"@typescript-eslint/eslint-plugin": "^4.5.0",
"@typescript-eslint/parser": "^4.5.0",
"commonjs": "latest",
"eslint": "^7.11.0",
"eslint-plugin-jsdoc": "^30.7.3",
"eslint-plugin-prefer-arrow": "^1.2.2",
"eslint-plugin-react": "^7.21.5",
"react-native-typescript-transformer": "^1.2.13",
"requirejs": "latest",
"ts-jest": "^26.4.1",
"tslib": "^2.0.3",
"typescript": "^4.0.3"
},
"private": true
}
Sources
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Source: Stack Overflow
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