Imports and Component Layout

The Shape of a React Component#

- imports
- Single use utilities [should refactor]
- CSS [We have Chakra, limit use]
- Component body
- Possible stateless subcomponent
- Export statement

Imports#

- React imports
- Third party package imports
(space)
- react contexts
- react components (includes pages)
- js services
- js utilities
(space)
- React.lazy dynamic imports

Example:

import React, { useEffect, useState, lazy, Suspense } from "react";
import { Switch, Route, useParams } from "react-router-dom";
import { useDao } from "../contexts/DaoContext";
import Dao from "../pages/Dao";
import Layout from "../components/layout";
import Modal from "../components/modal";
import { MolochService } from "../services/MolochService";
import { convertTimeUnits } from "../utils/Time";
const HeavySubPage = lazy(() => import("../pages/HeavySubPage"));

Component Body#

- Function declaration w/ props
- destructure contexts
- destructure props
(space)
- useState
- useRef
- simple expressions
(space)
- useEffect/useMemo
(space)
- Functions/useCallback
(space)
- Return statement (JSX)

Example:

/// FUNCTION DECLARATION
const Component = ({ bigProps }) => {
// DEPENDENCY DECLARATIONS
const { address, injectedProvider } = useInjectedProvider();
const { errorToast } = useOverlayContext();
// Don't have to destructure props, just an example of placement
const { smallProp, anotherSmallProps } = bigProps;
/// STATE DECLARATIONS
const [state, setState] = useState(null);
const [loading, setLoading] = useState(false);
const ref = useRef(null);
const isTrue = smallProp ? "yes" : "no";
// SIDE EFFECTS
useEffect(() => {
const painInTheAssAsyncFn = async (address) => {
setLoading(true);
try {
const sumthin = await fetchSumthin(address);
setState(sumthin);
} catch (error) {
console.error(error);
errorToast({
title: "Didn't Work",
description: "It didn't work, ok?",
});
setState(null);
} finally {
setLoading(false);
}
};
if (!state && address) {
painInTheAssAsyncFn(address);
}
}, [state, address]);
};
// FUNCTIONS
const handleClick = () => {
setState(false);
};
// OUTPUT
return (
<div>
<h1>Hey!</h1>
<button onClick={handleClick}>Click this!</button>
</div>
);