Mey NPM | npm.io

mey

A react package that exports hooks for handling the request lifecycle

Motivation

This package was created for people who don't want to go through the chore of handling the request lifecycle but don't want to reach for a big data fetching library. A lot of people do not need the complexity of a big library, the project's aren't complex enough to warrant such overhead but equally are tired of handling the request lifecycle and the questions that come with it such as:

"should i use useReducer or useState ?"
"do i have different slices of state or a state object? which is cleaner?" This package aims to take all that pain away and exports two hooks to handle it all useFetch and useMutation

Install

npm install --save mey

yarn add mey

it is written in TypeScript so no need to install types.

useFetch Usage

import { useFetch } from "mey";

const { data, loading, error, refetch } = useFetch(
  "https://jsonplaceholder.typicode.com/posts"
);
console.log("the data is:");
console.log(data);
if (!data && loading) {
  return <div> loading </div>;
}
if (error) {
  return <div> {error} </div>;
}
return <div>{data.map((el: any) => el.title)[0]}</div>;

useMutation Usage

import  {useMutation}  from "mey";

const { data, loading, error, handleRequest } = useMutation(
  "https://jsonplaceholder.typicode.com/posts", "post"
);
const submitHandler = () => {
const randomNumber = Math.random() * 100;
const body = {
  randomNumber
}
handleRequest(body);
};
return (
  <div>
  <p> generate a new random number: {data && !error ? data : error } </p>
  <button disabled={loading} onClick={submitHandler}> click me </button>
)

Typing the response

If you want your response typed both useFetch and useMutation accept a generic in which you'd pass in the type. You can view in example/src/index.tsx or an example useFetch implementation down below:

import { useFetch } from "mey";
const { data, loading, error, refetch } = useFetch<
  { body: string; userId: number; id: number; title: string }[]
>("https://jsonplaceholder.typicode.com/posts");
console.log("The data is:");
console.log(data);
if (!data && loading) {
  return <div> loading </div>;
}
if (error) {
  return <div> {error} </div>;
}
return <div>{data.map((el) => el.title)[0]}</div>;

Global Config

Mey ships with a provider called MeyProvider that you would wrap around <App/> or <Component/> in your root, entry point of your project as the case may be. MeyProvider accepts a single prop BaseURL that is the primary URL you would be making calls to. the point is to eliminate typing the same base path in every component that uses a hook. you'd simply now pass the path you're trying to hit e.g "/posts" which would translate to "https://yourbasepath.com/posts"

Global Config Example

import "./index.css";
import React from "react";
import ReactDOM from "react-dom";
import App from "./App";
import { MeyProvider } from "mey";
ReactDOM.render(
  <MeyProvider BaseURL="https://yourbasepath.com">
    <App />
  </MeyProvider>,
  document.getElementById("root")
);

Extended useFetch Usage

import { useFetch } from "mey";

const { data, loading, error, refetch } = useFetch(
  "https://jsonplaceholder.typicode.com/posts",
  {
    authorization: " bearer authentication-token",
    xpth: "xsssf",
  }
);
if (!data && loading) {
  return <div> loading </div>;
}
if (error) {
  return <div> {error} </div>;
}
return <div>{data.map((el: any) => el.title)[0]}</div>;

Extended useMutation Usage

import  {useMutation}  from "mey";

const { data, loading, error, handleRequest } = useMutation(
  "https://jsonplaceholder.typicode.com/posts", "post", {
    authorization: " bearer authentication-token",
    xpth: "xsssf",
  }
);
const submitHandler = () => {
const randomNumber = Math.random() * 100;
const body = {
  randomNumber
}
handleRequest(body);
};
return (
  <div>
  <p> generate a new random number: {data && !error ? data : error } </p>
  <button disabled={loading} onClick={submitHandler}> click me </button>
)

useFetch API

const { data, loading, error, refetch } = useFetch(url, headers);

Parameters

url: the URL path you want to fetch.
headers: (optional) an object representing the values you want to set on the request header.

Values

data: data for the given path.
loading: a boolean representing whether the request is loading or not.
error: a string representing a potential error thrown.
refetch: a function that refetches data.

useMutation API

const { data, loading, error, handleRequest } = useMey(
  url,
  requestType,
  headers
);

Parameters

url: the URL path you want to fetch.
requestType: a union of string types representing the type of mutation you want to carry out i.e put, post & delete.
headers: (optional) an object representing the values you want to set on the request header.

Values

data: data for the given path.
loading: a boolean representing whether the request is loading or not.
error: a string representing a potential error thrown.
handleRequest: a function that handles dispatching requests. it accepts a body value. if the body value is not an object it stops execution and prints an error message to the console.