ESLint rule to require useEffect callbacks to be named functions instead of anonymous functions
npm install eslint-plugin-use-effect-require-named-callbackAn ESLint plugin that requires useEffect callbacks to be named functions instead of anonymous functions, improving code readability and debugging experience.
``bash`
pnpm install --save-dev eslint-plugin-use-effect-require-named-callback
`javascript
// eslint.config.js
import useEffectRequireNamedCallback from "eslint-plugin-use-effect-require-named-callback";
export default [
{
plugins: {
"use-effect": useEffectRequireNamedCallback,
},
rules: {
"use-effect/use-effect-require-named-callback": "error",
},
},
];
`
`json`
{
"plugins": ["use-effect-require-named-callback"],
"rules": {
"use-effect-require-named-callback/use-effect-require-named-callback": "error"
}
}
This rule enforces using named functions as useEffect callbacks instead of anonymous arrow functions or anonymous function expressions.
`javascript
// Anonymous arrow function
useEffect(() => {
console.log("component mounted");
});
// Anonymous function expression
useEffect(function () {
console.log("component mounted");
});
// Async arrow function
useEffect(async () => {
await fetchData();
});
`
`javascript
// Named function expression
useEffect(function handleMount() {
console.log("component mounted");
});
// Function declaration passed as variable
function handleMount() {
console.log("component mounted");
}
useEffect(handleMount);
// Named function with dependencies
useEffect(
function handleDataUpdate() {
fetchData();
},
[dependency]
);
`
1. Improved debugging experience: Named functions appear clearly in stack traces, making debugging easier
2. Better code readability: Named functions provide context about what the effect does
3. Self-documenting code: Function names serve as inline documentation for effect purposes
4. Consistency: Enforces a consistent pattern across your React application
Without named functions:
``
Stack trace:
at
at useEffect (react.js:...)
With named functions:
```
Stack trace:
at handleDataFetch (Component.js:15:8)
at useEffect (react.js:...)