前言
我是歌谣 最好的种树是十年前 其次是现在 今天继续给大家带来的是原始typescript的讲解
环境配置
npm init -y
yarn add vite -D修改page.json配置端口
{
"name": "react_ts",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"dev": "vite --port 3002",
"server":"ts-node-dev ./server/app.ts"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"@types/express": "^4.17.17",
"@types/jquery": "^3.5.18",
"express": "^4.18.2",
"jquery": "^3.7.1",
"ts-node-dev": "^2.0.0",
"typescript": "^5.2.2",
"vite": "^4.4.9"
}
}后端部分
app.ts
import express, { Application } from "express"
import { readFileSync } from "fs"
import { resolve } from "path"
import bodyParse from "body-parser"
import { fileOperation, readFile, writeFile } from "./utils"
import { ITodoData } from "../src/typings"
const app: Application = express()
app.use(bodyParse.urlencoded({ extended: true }))
app.use(bodyParse.json())
app.all('*', (req, res, next) => {
res.header('Access-Control-Allow-Origin', "*")
res.header('Access-Control-Allow-Methods', "POST,GET,PUT,DELETE")
next();
})
app.get('/todolist', (req, res) => {
const todoList = fileOperation('todo.json') as string
console.log(todoList)
res.send(todoList)
})
app.post('/toggle', (req, res) => {
const id: number = parseInt(req.body.id)
// let todoList:ITodoData[]=JSON.parse(readFile('todo.json')||'[]')
// todoList=todoList.filter((todo:ITodoData)=>todo.id!==id)
// writeFile("todo.json",todoList)
fileOperation("todo.json", function (todoList: ITodoData[]) {
return todoList.map((todo: ITodoData) => {
if (todo.id === id) {
todo.completed = !todo.completed
}
return todo
})
})
res.send({
msg: "ok",
statusCode: "200"
})
})
app.post('/remove', (req, res) => {
const id: number = parseInt(req.body.id)
// let todoList:ITodoData[]=JSON.parse(readFile('todo.json')||'[]')
// todoList=todoList.filter((todo:ITodoData)=>todo.id!==id)
// writeFile("todo.json",todoList)
fileOperation("todo.json", function (todoList: ITodoData[]) {
return todoList.filter((todo: ITodoData) => todo.id !== id)
})
res.send({
msg: "ok",
statusCode: "200"
})
})
app.post('/add', (req, res) => {
const todo: ITodoData = JSON.parse(req.body.todo);
fileOperation("todo.json", function (todoList: ITodoData[]) {
const isExis = todoList.find((t: ITodoData) => {
t.content === todo.content
})
if (isExis) {
res.send({
msg: "exist",
statusCode: "100"
})
return
}
todoList.push(todo)
return todoList
})
res.send({
msg: "ok",
statusCode: "200"
})
})
app.listen(3003, () => {
console.log("ok")
})todo.json
[{"id":4,"content":"歌谣","completed":false}]untils.ts
import {readFileSync,writeFileSync} from "fs"
import {resolve} from "path"
import { ITodoData } from "../src/typings"
export function readFile(path:string):string{
return readFileSync(resolve(__dirname,path),"utf8")
}
export function writeFile<T>(path:string,data:T):void{
writeFileSync(resolve(__dirname,path),JSON.stringify(data))
}
export function fileOperation(path:string,fn?:any):string|void{
let todoList:ITodoData[]=JSON.parse(readFile('todo.json')||'[]')
if(!fn){
return JSON.stringify(todoList)
}
todoList=fn(todoList)
writeFile<ITodoData[]>(path,todoList)
}
export function remove(path:string,fn?:any):string|void{
let todoList:ITodoData[]=JSON.parse(readFile('todo.json')||'[]')
if(!fn){
return JSON.stringify(todoList)
}
todoList=fn(todoList)
writeFile<ITodoData[]>(path,todoList)
}todoserver.ts
import $ from 'jquery'
import { ITodoData } from './typings'
export function getTodoList(
target: any,
methodName: string,
descriptor: PropertyDescriptor
): void {
console.log(target, methodName, descriptor)
const _origin = descriptor.value
descriptor.value = function (todoData: ITodoData[]) {
$.get("http://localhost:3003/todolist").then((res: string) => {
if (!res) {
return
}
todoData = JSON.parse(res)
}).then(() => {
_origin.call(this, todoData)
})
}
}
export function removeTodo(target: any,
methodName: string,
descriptor: PropertyDescriptor): void {
const _origin = descriptor.value
descriptor.value = function (target: HTMLElement,id:number) {
$.post("http://localhost:3003/remove",{id}).then((res: string) => {
_origin.call(this, target,id)
})
}
}
export function toggleTodo(target: any,
methodName: string,
descriptor: PropertyDescriptor): void {
const _origin = descriptor.value
descriptor.value = function (target: HTMLElement,id:number) {
$.post("http://localhost:3003/toggle",{id}).then((res: string) => {
_origin.call(this, target,id)
})
}
}
export function addTodo(target: any,
methodName: string,
descriptor: PropertyDescriptor): void {
const _origin = descriptor.value
descriptor.value = function (todo:ITodoData[]) {
$.post("http://localhost:3003/add",{todo:JSON.stringify(todo)}).then((res: any) => {
if(res.statusCode==="100"){
alert("该项已经存在")
return
}
_origin.call(this, todo)
})
}
}前端
app.ts
import { ITodoData } from "./typings";
import TodoEvent from "./TodoEvent";
; ((doc) => {
const oInput: HTMLInputElement = document.querySelector('input') as HTMLInputElement
const oAddBtn: HTMLElement = document.querySelector('button') as HTMLElement
const oTodoList: HTMLElement = document.querySelector('.todo-list') as HTMLElement
const todoData: ITodoData[] = [
{
id: 1,
content: 'geyao',
completed: false
},
{
id: 2,
content: 'fangfang',
completed: false
},
{
id: 3,
content: 'kang',
completed: false
}
]
const init = (): void => {
bindEvent()
}
function bindEvent(): void {
oAddBtn.addEventListener("click", handleAddBtnClick, false)
oTodoList.addEventListener("click", handleListClick, false)
}
function handleAddBtnClick(): void {
const val:string=oInput.value.trim()
console.log(val,"val is")
if(val.length){
const ret= todoEvent.addTodo(<ITodoData>{
id: 4,
content: val,
completed: false
})
if(ret&&ret===1001){
alert("列表已经存在")
return
}
oInput.value=''
}
}
function handleListClick(e: MouseEvent): void {
const tar = e.target as HTMLElement
const tagName = tar.tagName.toLowerCase()
if (tagName === 'input' || tagName === 'button') {
const id=parseInt(tar.dataset.id as string)
switch (tagName) {
case 'input':
todoEvent.toggleComplete(tar,id)
break;
case 'button':
todoEvent.removeTodo(tar,id)
break;
default:
break;
}
}
}
const todoEvent: TodoEvent = new TodoEvent(todoData,oTodoList)
init()
})(document)todoDom.ts
import TodoTemplate from "./TodoTemplate";
import { ITodoData } from "./typings";
import { createItem, findParentNode } from "./utils";
class TodoDom extends TodoTemplate{
private todoWarpper:HTMLElement;
constructor(todoWarpper:HTMLElement){
super()
this.todoWarpper=todoWarpper
}
protected initList(todoData:ITodoData[]){
if(todoData.length){
const oFrag:DocumentFragment=document.createDocumentFragment()
todoData.map((todo:ITodoData)=>{
const oItem:HTMLElement= createItem("div","todo-item",this.todoView(todo))
// const oItem:HTMLElement=document.createElement("div")
// oItem.className='todo-item'
// oItem.innerHTML=this.todoView(todo)
oFrag.appendChild(oItem)
})
this.todoWarpper.appendChild(oFrag)
}
}
protected addItem(todo:ITodoData){
const oItem:HTMLElement= createItem("div","todo-item",this.todoView(todo))
// const oItem:HTMLElement=document.createElement('div');
// oItem.className='todo-item'
// oItem.innerHTML=this.todoView(todo)
this.todoWarpper.appendChild(oItem)
}
protected removeItem(target:HTMLElement){
const oParentNode:HTMLElement=findParentNode(target,"todo-item");
oParentNode.remove()
}
protected changeCompleted(target:HTMLElement,completed:boolean){
const oParentNode:HTMLElement=findParentNode(target,"todo-item");
const oContent:HTMLElement=oParentNode.getElementsByTagName("span")[0]
oContent.style.textDecoration=completed?'line-through':"none"
}
}
export default TodoDomtodoTemplate.ts
import { ITodoData } from "./typings";
class TodoTemplate{
protected todoView({id,content,completed}:ITodoData):string{
return `
<input type="checkbox" ${completed}?'checked':'' data-id="${id}"/>
<span style="text-decoration":${completed}?'line-through':'none'>${content}</span>
<button data-id='${id}'>删除</button>
`
}
}
export default TodoTemplateuntils.ts
import { callbackify } from "util"
export function findParentNode(target:HTMLElement,className:string):any{
while(target=target.parentNode as HTMLElement){
if(target.className===className){
return target
}
}
}
export function createItem(tagName:string,className:string,todoItem:string):HTMLElement{
const oItem:HTMLElement=document.createElement(tagName)
oItem.className=className
oItem.innerHTML=todoItem
return oItem
}index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Ts</title>
</head>
<body>
<div class="app">
<div class="todo-input">
<input type="text" placeholder="请输入代办事项">
<button>增加</button>
</div>
<div class="todo-list"></div>
</div>
<script type="module" src="./src/app.ts"></script>
</body>
</html>tsconfig.json
{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig to read more about this file */
/* Projects */
// "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
// "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */
// "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */
// "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */
// "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */
// "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */
/* Language and Environment */
"target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
// "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */
// "jsx": "preserve", /* Specify what JSX code is generated. */
"experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */
"emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */
// "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
// "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
// "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
// "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
// "noLib": true, /* Disable including any library files, including the default lib.d.ts. */
// "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */
// "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */
/* Modules */
"module": "commonjs", /* Specify what module code is generated. */
// "rootDir": "./", /* Specify the root folder within your source files. */
// "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */
// "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */
// "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */
// "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */
// "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */
// "types": [], /* Specify type package names to be included without being referenced in a source file. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
// "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */
// "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
// "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */
// "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */
// "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
// "resolveJsonModule": true, /* Enable importing .json files. */
// "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */
// "noResolve": true, /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
/* JavaScript Support */
// "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
// "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */
// "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
/* Emit */
// "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
// "declarationMap": true, /* Create sourcemaps for d.ts files. */
// "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */
// "sourceMap": true, /* Create source map files for emitted JavaScript files. */
// "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */
// "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
// "outDir": "./", /* Specify an output folder for all emitted files. */
// "removeComments": true, /* Disable emitting comments. */
// "noEmit": true, /* Disable emitting files from a compilation. */
// "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
// "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */
// "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
// "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */
// "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
// "newLine": "crlf", /* Set the newline character for emitting files. */
// "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
// "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */
// "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */
// "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */
// "declarationDir": "./", /* Specify the output directory for generated declaration files. */
// "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
/* Interop Constraints */
// "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */
// "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
// "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */
"esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
// "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
"forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
/* Type Checking */
"strict": true, /* Enable all strict type-checking options. */
// "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */
"strictNullChecks": false, /* When type checking, take into account 'null' and 'undefined'. */
// "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
// "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
// "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */
// "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */
// "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */
// "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */
// "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */
// "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */
// "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */
// "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */
// "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */
// "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */
// "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */
// "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */
// "allowUnusedLabels": true, /* Disable error reporting for unused labels. */
// "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */
/* Completeness */
// "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */
"skipLibCheck": true /* Skip type checking all .d.ts files. */
}
}运行结果
后台启动
npm run server
前端
