React17+TS4 project construction

1. Create a new react+ts project
npx create-react-app <appname> --template typescript
2. push the new local project to the remote warehouse

New remote warehouse
 Open the local project directory and add all the existing files in the current directory to the newly created git warehouse
 Execute git add
 Submit the added documents and write the description information
git commit -m "item init"
Associate a local warehouse with a remote warehouse
 git remote add origin
 push the contents of the local warehouse to the remote warehouse
git push -u origin master

3. Modify tsconfig JSON file
 add to 
"baseUrl": "./src", / / configure absolute path pointing
 Note: (4-6) steps can be omitted (it is part of the format configuration engineering submission specification, which is not clarified for the time being, which is prone to errors, and will be supplemented later)

4. Install the formatting tool Prettier
yarn add --dev --exact prettier
 Create format profile
echo {}> .prettierrc.json
 New prettierignore file
 Fill in the following contents:
 Ignore artifacts:
 After that, you can use yarn prettier --write To format the code

During team collaborative development, in order to unify and automate the code format before submission
 Need to use pre commit hook
npx mrm@2 lint-staged
 Will be in package One more line of JavaScript in the file
prepare": "husky install"

 "devDependencies": {
    "husky": "^7.0.4",
    "lint-staged": "^12.3.4",
    "prettier": "2.5.1"
This indicates the file suffix to be formatted. We need to add the suffix at the end of TS and TSX
  "lint-staged": { 
    "*.{js,css,md,ts,tsx}": "prettier --write"
To be generated Add husky directory to git  

5. Because the creation of the project itself will have eslint configuration, which will conflict with our prettier configuration
 Therefore, it needs to be specially configured for eslint
npm install --save-dev eslint-config-prettier
 After the installation is completed, click package Modify JSON and add prettier to eslint
"eslintConfig": {
"extends": [
]/ / indicates that the prettier rule overrides some of the eslint rules

6. Configure the commitlint specification project -- check whether the commit message complies with the specification
npm install --save-dev @commitlint/config-conventional @commitlint/cli
 Add commitlint config. JS file definition specification. Because the file encoding format created by the following command is not utf-8, an error may be reported when submitting.
Therefore, it is recommended to manually create commitlint config. JS file, copy and paste module exports = {extends: ['@commitlint/config-conventional']};

echo "module.exports = {extends: ['@commitlint/config-conventional']}" > commitlint.config.js

 npx husky add . Husky / commit MSG 'NPX -- no -- commitlint -- edit "$1"' will be in Add a new commit MSG file in husky directory
 Use this command to cancel verification: git commit -m "project list" -- no verify

7. Installation json-server
 NPM install - G JSON server global installation
 NPM install JSON server - D project
 Create a new directory json_server_mock  __ Indicates the directory where the secondary exists
Create dB. In this directory JSON file
 You can fill in the contents, such as
Modify package Add "JSON server" to the scripts of the JSON file: "JSON server _json_server _mock_/ db.json -- watch"
 "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "prepare": "husky install",
    "json-server": "json-server __json_server_mock__/db.json --watch --port 3001"
  --Port specifies the port number
 Finally, execute NPM run JSON server to start the mock service

8. Create Env and env. Developep files
 Configure the interface api request address react in it_ APP_ api_ URL =  http://localhost:3001
 When quoting:
const apiUrl = process.env.REACT_APP_API_URL

9. The parameter is null when the haircut request is processed  
Create a new utils directory under src
 New index JS file, as follows:
export const isFalsy = (value) => value === 0 ?  false: ! Value / / judge the bool value of the parameter after excluding 0

//In a function, changing the incoming object itself is not good
export const cleanObject = (object) =>{
    // Object.assign({},object)
    const  result = {...object}
    Object.keys(result ).forEach(key=>{
        const value = result [key]
        if(isFalsy(value)) {
            delete result[key]
    return result

Install qs plug-in
npm install qs --save-dev
 Replace the final request path with:

The final file directory

Use jsonServer to make mock requests. A small demo is written below


  "users": [
      "id": 1,
      "name": "Gao Xiuwen"
      "id": 2,
      "name": "Xiong Tiancheng"
      "id": 3,
      "name": "Zheng Hua"
      "id": 4,
      "name": "Wang Wenjing"
  "projects": [
      "id": 1,
      "name": "Rider management",
      "personId": 1,
      "organization": "Takeout group",
      "created": 1604989757139
      "id": 2,
      "name": "Group buying APP",
      "personId": 2,
      "organization": "Group buying group",
      "created": 1604989757139
      "id": 3,
      "name": "Material management system",
      "personId": 2,
      "organization": "Material group",
      "created": 1546300800000
      "id": 4,
      "name": "Headquarters management system",
      "personId": 3,
      "organization": "headquarters",
      "created": 1604980000011
      "id": 5,
      "name": "Meal delivery route planning system",
      "personId": 4,
      "organization": "Takeout group",
      "created": 1546900800000



import React from "react";
import {cleanObject} from "../../utils";
import {SearchPanel} from "./search-panel";
import {List} from "./list";
import * as qs from "qs";
import {useEffect, useState} from "react";

const apiUrl = process.env.REACT_APP_API_URL

export const ProjectListScreen = () => {
    const [param, setParam] = useState({
        name: '',
        personId: ''
    const [users, setUsers] = useState([])
    const [list, setList] = useState([])
    useEffect(() => {
        fetch(`${apiUrl}/projects?${qs.stringify(cleanObject(param))}`).then(async response => {
            if (response.ok) {
                setList(await response.json())
    }, [param])
    useEffect(() => {
        fetch(`${apiUrl}/users`).then(async response => {
            if (response.ok) {
                setUsers(await response.json())

    return <div>
        <SearchPanel param={param} setParam={setParam} users={users}/>
        <List list={list} users={users}/>


import React from "react";

export const List = ({list, users}) => {
    return <table className={'my-table'}>
            <th>person in charge</th>
   => <tr key={}>
                <td>{users.find(user => === project.personId)?.name || 'unknown'}</td>
                {/*{?.name Indicates that name} is displayed when the content of the previous expression is true*/}



import React from "react";
import {useEffect, useState} from "react";

export const SearchPanel = ({param,setParam,users}) => {

    return <form action="">
            <input type="text" value={} onChange={evt => setParam({
            <select value={param.personId} onChange={evt => setParam({
                <option value={''}>person in charge</option>
           => <option value={} key={}>{}</option>)


import React from 'react';
import './App.css';
import {ProjectListScreen} from "./screens/project-list";

function App() {
    return (
        <div className="App">

export default App;





Keywords: Javascript Front-end React

Added by Tjeuten on Sat, 05 Mar 2022 00:08:51 +0200